Webster's Unabridged Dictionary - Letter P - Page 42
Perigonium (n.) [NL.] Same as Perigone.
Perigord pie () A pie made of truffles, much esteemed by epicures.
Perigraph (n.) A careless or inaccurate delineation of anything. [R.]
Perigynia (n. pl. ) of Perigynium.
Perigynium (n.) (Bot.) Some unusual appendage about the pistil, as the bottle-shaped body in the sedges, and the bristles or scales in some other genera of the Sedge family, or Cyperaceae.
Perigynous (a.) (Bot.) Having the ovary free, but the petals and stamens borne on the calyx; -- said of flower such as that of the cherry or peach. Perihelion
Perihelia (n. pl. ) of Perihelium.
Perihelion (n.) Alt. of Perihelium.
Perihelium (n.) (Astron.) 【天】近日點；最高點 That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion.
Perihelion (n.) Periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun [ant: aphelion].
Peril (n.) （嚴重的）危險 [U]；危險的事物 [C] Danger; risk; hazard; jeopardy; exposure of person or property to injury, loss, or destruction.
In perils of waters, in perils of robbers. -- 2 Cor. xi. 26.
Adventure hard With peril great achieved. -- Milton.
At one's peril, or On one's peril, With risk or danger to one; at the hazard of. "On thy soul's peril." -- Shak.
Syn: Hazard; risk; jeopardy. See Danger.
Periled (imp. & p. p.) of Peril.
Perilled () of Peril.
Periling (p. pr. & vb. n.) of Peril.
Perilling () of Peril.
Peril (v. t.) 使有危險，使臨險境；危及 To expose to danger; to hazard; to risk; as, to peril one's life.
Peril (v. i.) To be in danger. [Obs.] -- Milton.
Peril (n.) A source of danger; a possibility of incurring loss or misfortune; "drinking alcohol is a health hazard" [syn: {hazard}, {jeopardy}, {peril}, {risk}, {endangerment}].
Peril (n.) A state of danger involving risk [syn: {riskiness}, {peril}].
Peril (n.) A venture undertaken without regard to possible loss or injury; "he saw the rewards but not the risks of crime"; "there was a danger he would do the wrong thing" [syn: {risk}, {peril}, {danger}].
Peril (v.) Pose a threat to; present a danger to; "The pollution is endangering the crops" [syn: {endanger}, {jeopardize}, {jeopardise}, {menace}, {threaten}, {imperil}, {peril}].
Peril (v.) Put in a dangerous, disadvantageous, or difficult position [syn: {queer}, {expose}, {scupper}, {endanger}, {peril}].
Peril. () The accident by which a thing is lost Lee,. Dr. Rom. 911.
Perilla (n.) (Bot.) A genus of labiate herbs, of which one species (Perilla ocimoides, or P. Nankinensis) is often cultivated for its purple or variegated foliage.
Perilla (n.) Small genus of Asiatic herbs [syn: Perilla, genus Perilla].
Perilous (a.) [Written also perillous.] 危險的；冒險的 Full of, attended with, or involving, peril; dangerous; hazardous; as, a perilous undertaking.
Infamous hills, and sandy, perilous wilds. -- Milton.
Perilous (a.) Daring; reckless; dangerous. [Obs.] -- Latimer.
For I am perilous with knife in hand. -- Chaucer. -- Per"il*ous*ly, adv. -- Per"il*ous*ness, n.
Perilous (a.) Fraught with danger; "dangerous waters"; "a parlous journey on stormy seas"; "a perilous voyage across the Atlantic in a small boat"; "the precarious life of an undersea diver"; "dangerous surgery followed by a touch-and-go recovery" [syn: parlous, perilous, precarious, touch-and-go].
Perilymph (n.) (Anat.) The fluid which surrounds the membranous labyrinth of the internal ear, and separates it from the walls of the chambers in which the labyrinth lies.
Perilymph (n.) The bodily fluid that fills the space between the bony labyrinth and the membranous labyrinth of the inner ear.
Perilymphangial (a.) (Anat.) Around, or at the side of, a lymphatic vessel.
Perilymphatic (a.) (Anat.) Pertaining to, or containing, perilymph.
Perilymphatic (a.) (Anat.) Perilymphangial.
Perimeter (n.) (Geom.) The outer boundary of a body or figure, or the sum of all the sides.
Perimeter (n.) An instrument for determining the extent and shape of the field of vision. Perimetric
Perimeter (n.) The boundary line or the area immediately inside the boundary [syn: margin, border, perimeter].
Perimeter (n.) A line enclosing a plane areas.
Perimeter (n.) The size of something as given by the distance around it [syn: circumference, perimeter].
Perimetric (a.) Alt. of Perimetrical.
Perimetrical (a.) Of or pertaining to the perimeter, or to perimetry; as, a perimetric chart of the eye.
Perimetry (n.) The art of using the perimeter; measurement of the field of vision.
Perimorph (n.) (Min.) A crystal of one species inclosing one of another species. See Endomorph.
Perimysial (a.) (Anat.) Surrounding a muscle or muscles.
Perimysial (a.) (Anat.) Of or pertaining to the perimysium.
Perimysium (n.) (Anat.) 肌束膜 The connective tissue sheath which surrounds a muscle, and sends partitions inwards between the bundles of muscular fibers.
Perimysium (n.) The sheath of connective tissue that covers a bundle of muscle fibers.
Perinaeum (n.) See Perineum.
Perineal (a.) (Anat.) Of or pertaining to the perineum.
Perineoplasty (n.) (Med.) The act or process of restoring an injured perineum.
Perineorrhaphy (n.) (Med.) The operation of sewing up a ruptured perineum.
Perinephritis (n.) (Med.) Inflammation of the cellular tissue around the kidney. -- Per`i*ne*phrit"ic, a.
Perineum (n.) (Anat.) The region which is included within the outlet of the pelvis, and is traversed by the urinogenital canal and the rectum.
Perineum (n.) The general region between the anus and the genital organs.
Perineurial (a.) (Anat.) Surrounding nerves or nerve fibers; of or pertaining to the perineurium.
Perineurium (n.) (Anat.) The connective tissue sheath which surrounds a bundle of nerve fibers. See Epineurium, and Neurilemma.
Perineurium (n.) The sheath of connective tissue that covers a bundle of nerve fibers.
Perinuclear (a.) (Biol.) Of or pertaining to a nucleus; situated around a nucleus; as, the perinuclear protoplasm.
Period (n.) [C] 時期，期間；時代；（一堂）課，課時；週期；生理期，月經；【美】句號；複合句；完整句；【數】循環節；週期；【音】樂段 A portion of time as limited and determined by some recurring or cyclic phenomenon, as by the completion of a revolution of one of the heavenly bodies; a division of time, as a series of years, months, or days, in which something is completed, and ready to recommence and go on in the same order; as, the period of the sun, or the earth, or a comet; the period of an electromagnetic wave is the time interval between maxima.
Period (n.) Hence: A stated and recurring interval of time; more generally, an interval of time specified or left indefinite; a certain series of years, months, days, or the like; a time; a cycle; an age; an epoch; as, the period of the Roman republic.
How by art to make plants more lasting than their ordinary period. -- Bacon.
Period (n.) (Geol.) One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology.
Period (n.) The termination or completion of a revolution, cycle, series of events, single event, or act; hence, a limit; a bound; an end; a conclusion. -- Bacon.
So spake the archangel Michael; then paused, As at the world's great period. -- Milton.
Evils which shall never end till eternity hath a period. -- Jer. Taylor.
This is the period of my ambition. -- Shak.
Period (n.) (Rhet.) A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence. "Devolved his rounded periods." -- Tennyson.
Periods are beautiful when they are not too long. -- B. Johnson.
Note: The period, according to Heyse, is a compound sentence consisting of a protasis and apodosis; according to Becker, it is the appropriate form for the coordinate propositions related by antithesis or causality. -- Gibbs.
Period (n.) (Print.) The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word.
Period (n.) (Math.) One of several similar sets of figures or terms usually marked by points or commas placed at regular intervals, as in numeration, in the extraction of roots, and in circulating decimals.
Period (n.) (Med.) The time of the exacerbation and remission of a disease, or of the paroxysm and intermission.
Period (n.) (Mus.) A complete musical sentence.
Period (n.) (Sports) One of the specified time intervals into which a game is divided; as, there are three periods in a hockey game.
Period (n.) (Education) One of the specified time intervals into which the academic day is divided; as, my calculus class is in the first period.
Period (n.) The time interval during which a woman is menstruating, or the event of a single menstruation; as, her period was late this month.
The period, The present or current time, as distinguished from all other times.
Syn: Time; date; epoch; era; age; duration; limit; bound; end; conclusion; determination.
Period (v. t.) To put an end to. [Obs.] -- Shak.
Period (v. i.) To come to a period; to conclude. [Obs.] "You may period upon this, that," etc. --Felthman.
Period (n.) An amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period" [syn: time period, period of time, period].
Period (n.) The interval taken to complete one cycle of a regularly repeating phenomenon.
Period (n.) (Ice hockey) one of three divisions into which play is divided in hockey games.
Period (n.) A unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods" [syn: period, geological period].
Period (n.) The end or completion of something; "death put a period to his endeavors"; "a change soon put a period to my tranquility."
Period (n.) The monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females" -- Aristotle [syn: menstruation, menses, menstruum, catamenia, period, flow].
Period (n.) A punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations; "in England they call a period a stop" [syn: period, point, full stop, stop, full point].
Period, () The time between repetitions of any cyclic event or phenomenon such as an electromagnetic wave or planetary orbit. Period is the reciprocal of frequency.
Period, () American for full stop.
(2010-07-25)
Period (a.) 某一時代（特有）的 Of, relating to, or representing a particular historical period.
Periodate (n.) (Chem.) A salt of periodic acid.
Periodic (a.) (Chem.) [Z] [B] 週期的，週期性的；定期的；時而發生的；間歇（性）的；【數】循環的；週期函數的 Pertaining to, derived from, or designating, the highest oxygen acid ({HIO4) of iodine. Periodic
Periodic (a.) Alt. of Periodical.
Periodical (a.) [Z] [B] 週期的，週期性的；定期的；時而發生的；間歇（性）的；【數】循環的；週期函數的 Of or pertaining to a period or periods, or to division by periods.
The periodical times of all the satellites. -- Sir J. Herschel.
Periodical (a.) Performed in a period, or regular revolution; proceeding in a series of successive circuits; as, the periodical motion of the planets round the sun.
Periodical (a.) Happening, by revolution, at a stated time; returning regularly, after a certain period of time.
The periodic return of a plant's flowering. -- Henslow.
To influence opinion through the periodical press. -- Courthope.
Periodical (a.) Acting, happening, or appearing, at fixed or somewhat variable intervals; recurring; as, periodical epidemics.
Periodical (a.) (Rhet.) Of or pertaining to a period; constituting a complete sentence.
{Periodic comet} (Astron.), A comet that moves about the sun in an elliptic orbit; a comet that has been seen at two of its approaches to the sun.
{Periodic function} (Math.), A function whose values recur at fixed intervals as the variable uniformly increases. The trigonomertic functions, as sin(x), tan(x), etc., are periodic functions. Exponential functions are also periodic, having an imaginary period, and the elliptic functions have not only a real but an imaginary period, and are hence called doubly periodic.
Compare: Trigonometric
Trigonometric (a.) 【數】三角學的；三角法的 See Trigonometry
Compare: Trigonometry
Trigonometry (n.) [Mass noun] 【數學】三角法，三角學；關于三角學的論文 [教科書] The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.
{Periodic law} (Chem.), The generalization that the properties of the chemical elements are periodic functions of their atomic weights. "In other words, if the elements are grouped in the order of their atomic weights, it will be found that nearly the same properties recur periodically throughout the entire series." The following tabular arrangement of the atomic weights shows the regular recurrence of groups (under I., II., III., IV., etc.), each consisting of members of the same natural family. The gaps in the table indicate the probable existence of unknown elements.
{Periodic table}, {Periodic table of the elements} (Chem.), (ph.) 【化】元素週期表 A tabular arrangement of the chemical elements, illustrating the {periodic law}, described above.
Note: A similar relation had been enunciated in a crude way by Newlands; but the law in its effective form was developed and elaborated by Mendelejeff, whence it is sometimes called {Mendelejeff's law}. Important extensions of it were also made by L. Meyer. By this means Mendelejeff predicted with remarkable accuracy the hypothetical elements ekaboron, ekaluminium, and ekasilicon, afterwards discovered and named respectively scandium, gallium, and germanium.
{Periodic star} (Astron.), A variable star whose changes of brightness recur at fixed periods.
{Periodic time of a heavenly body} (Astron.), The time of a complete revolution of the body about the sun, or of a satellite about its primary.
Periodic (a.) Happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust" [syn: periodic, periodical] [ant: aperiodic, nonperiodic].
Periodic (a.) Recurring or reappearing from time to time; "periodic feelings of anxiety" [syn: periodic, occasional].
Periodical (n.) 期刊 [C] A magazine or other publication which appears at stated or regular intervals.
Periodical (a.) Happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust" [syn: periodic, periodical] [ant: aperiodic, nonperiodic].
Periodic (a.) Recurring or reappearing from time to time; "periodic feelings of anxiety" [syn: periodic, occasional].
Periodical (n.) A publication that appears at fixed intervals.
Periodic table (n.) (Chemistry) A tabular arrangement of the chemical elements according to atomic number as based on the periodic law.
Periodicalist (n.) One who publishes, or writes for, a periodical.
Periodically (adv.) 週期性地；定期地；偶爾 In a periodical manner ; as, flooding occurs periodically in the valley.
Periodically (adv.) In a sporadic manner; "he only works sporadically" [syn: {sporadically}, {periodically}].
Periodicalness (n.) Periodicity.
Periodicities (n. pl. ) of Periodicity.
Periodicity (n.) 定期；週期性；周律 The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants. -- Henfrey.
Periodicity (n.) The quality of recurring at regular intervals [syn: cyclicity, periodicity].
Periodide (n.) An iodide containing a higher proportion of iodine than any other iodide of the same substance or series.
Periodontal (a.) (Anat.) 牙周的 Surrounding the teeth.
Periodontal (a.) Of or relating to or involving or practicing periodontics; "periodontal disease" [syn: periodontic, periodontal].
Periodoscope (n.) (Med.) A table or other means for calculating the periodical functions of women. -- Dunglison. Perioeci
Perioeci (n. pl.) Alt. of Perioecians
Perioecians (n. pl.) Those who live on the same parallel of latitude but on opposite meridians, so that it is noon in one place when it is midnight in the other. Compare Antoeci.
Periople (n.) (Anat.) The external smooth horny layer of the hoof of the horse and allied animals.
Perioplic (a.) (Anat.) Of or pertaining to the periople; connected with the periople.
Periosteal (a.) (Anat.) Situated around bone; of or pertaining to the periosteum.
Periosteum (n.) (Anat.) 【解】骨膜 The membrane of fibrous connective tissue which closely invests all bones except at the articular surfaces.
Periosteum (n.) A dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone.
Periostitis (n.) (Med.) Inflammation of the periosteum.
Periostraca (n. pl. ) of Periostracum.
Periostracum (n.) (Zool.) 外殼膜 A chitinous membrane covering the exterior of many shells; -- called also epidermis.
Periotic (a.) (Anat.) 耳朵周圍的；耳外骨的 Surrounding, or pertaining to the region surrounding, the internal ear; as, the periotic capsule.
Periotic (n.) A periotic bone.
Peripatecian (n.) A peripatetic. [Obs.]
Peripatetic (a.) Walking about; itinerant.
Peripatetic (a.) Of or pertaining to the philosophy taught by Aristotle (who gave his instructions while walking in the Lyceum at Athens), or to his followers. "The true peripatetic school." -- Howell.
Peripatetic (n.) One who walks about; a pedestrian; an itinerant. -- Tatler.
Peripatetic (n.) A disciple of Aristotle; an Aristotelian.
Peripatetic (a.) Of or relating to Aristotle or his philosophy; "Aristotelean logic" [syn: Aristotelian, Aristotelean, Aristotelic, peripatetic].
Peripatetic (a.) Traveling especially on foot; "peripatetic country preachers"; "a poor wayfaring stranger" [syn: peripatetic, wayfaring].
Peripatetic (n.) A person who walks from place to place.
Peripatetic (n.) A follower of Aristotle or an adherent of Aristotelianism [syn: Aristotelian, Aristotelean, Peripatetic].
Peripatetic (a.) Walking about. Relating to the philosophy of Aristotle, who, while expounding it, moved from place to place in order to avoid his pupil's objections. A needless precaution -- they knew no more of the matter than he.
Peripatetical (a.) Peripatetic. [R.] -- Hales.
Peripateticism (n.) The doctrines or philosophical system of the peripatetics. See Peripatetic, n., 2. --Lond. Sat. Rev. Peripatopsis
Peripateticism (n.) (Philosophy) The philosophy of Aristotle that deals with logic and metaphysics and ethics and poetics and politics and natural science; "Aristotelianism profoundly influenced Western thought" [syn: Aristotelianism, peripateticism].
Peripatopsis, Peripatus (prop. n.) (Zool.) The type genus of Peripatopsidae, consisting of onychophorans (lowly organized invertebrates related evolutionarily to the arthropods, also called "walking worms" AND "velvet worms") found chiefly in Asiatic and African tropical regions, in South Africa, Australia, New Zealand, and tropical America.
Syn: genus Peripatopsis.
The average resident of the Northern Hemisphere is probably not familiar with the Onychophora; they are restricted to forest regions of South America, Africa, the Caribbean, and Oceania. Shy creatures, able to hide in incredibly tight crevices, these "velvet worms" (about ninety living species known) are rarely seen even in their natural habitat. Yet onychophorans are of great interest to biologists, because they seem to be related to arthropods, and give us an idea of what the ancestors of the arthropods may have been like. Although they are rare as fossils, a number that have been found from the Cambrian period. These fossils show that abundant marine relatives of the Onychophora flourished in the seas 520 million years ago. -- From:
Note: In the 1913 Webster Peripatus was identified with the now disused order Malacopoda (within the phylum arthropoda); however, Malacopoda is now assigned to a group contained within the phylum Onycophora. The name Peripatus has also been used (possibly erroneously) to designate a specific species, as indicated in the following quotation found on the internet.
The onychophora, peripatus, is a unique creature, found in New Zealand. There is no other like peripatus. It is probably a creature from the dawn of time, as it seems to have a fossil representative of the most early invertebrates: Aysheaia, as may be found in some deposits of Burgess Shale.
Aside from a lovely name, Peripatus doesn't look much like an earth creature. It is also frequently colored blue. It has a mixture of attributes similar to both annelida and arthopoda. I have also found interesting the arguments taxonomists have had for years over the creature; it's taxonomy has been fussed and fought over, and changed several times. Mostly, there just isn't anything like it.
Its pre-historic relative (which looks just like it), lived at a time when mother nature was just begining to make complex, multi-cellular creatures, and most of them (with the exception of the jellyfish) looked like pure experiments in physical design. No decendants remain of them, except Peripatus. They were all bizzare in the extreme, like something from a sci-fi nightmare.
And they are all gone.
Except Peripatus. Peripatus still remains. It is totally bizzare, and totally unique. -- Jonathon R. Oglesbee
Peripatus (n.) Any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms [syn: onychophoran, velvet worm, peripatus].
Peripatus (n.) A genus of lowly organized arthropods, found in South Africa, Australia, and tropical America. It constitutes the order Malacopoda.
Peripetalous (a.) (Bot.) Surrounding, or situated about, the petals.
Peripheral (a.) 周邊的，周圍的，膚淺的 Of or pertaining to a periphery; constituting a periphery; peripheric.
Peripheral (a.) (Anat.) External; away from the center; as, the peripheral portion of the nervous system.
Peripheral (a.) Pertaining to minor, unimportant, superficial, or irrelevant aspects of the matter in question; as, peripheral isssues are dealt with in the appendix. Peripheric
Peripheral (a.) On or near an edge or constituting an outer boundary; the outer area; "Russia's peripheral provinces"; "peripheral suburbs" [ant: central].
Peripheral (a.) Related to the key issue but not of central importance; "a peripheral interest"; "energy is far from a peripheral issue in the economy"; "peripheral issues."
Peripheral (n.) (Computer science) electronic equipment connected by cable to the CPU of a computer; "disk drives and printers are important peripherals" [syn: peripheral, computer peripheral, peripheral device].
Peripheral
Device
Peripheral device
(Or "peripheral device", "device") Any part of a computer other than the CPU or working memory, i.e. disks, keyboards, monitors, mice, printers, scanners, tape drives, microphones, speakers, cameras, to list just the less exotic ones.
High speed working memory, such as RAM, ROM or, in the old days, core would not normally be referred to as peripherals. The more modern term "device" is also more general in that it is used for things such as a pseudo-tty, a RAM drive, or a network adaptor.
Some argue that, since the advent of the personal computer, the motherboard, hard disk, keyboard, mouse, and monitor are all parts of the base system, and only use the term "peripheral" for optional additional components.
(2002-09-03)
Peripheric (a.) Alt. of Peripherical.
Peripherical (a.) See Peripheral.
Peripheries (n. pl. ) of Periphery.
Periphery (n.) 圓周；周圍；【解】體表；（神經的）末梢；次要部分 The outside or superficial portions of a body; the surface.
Periphery (n.) (Geom.) The circumference of a circle, ellipse, or other figure.
Periphery (n.) The outside boundary or surface of something [syn: {periphery}, {fringe}, {outer boundary}].
Periphrase (n.) The use of more words than are necessary to express the idea; a roundabout, or indirect, way of speaking; circumlocution.
Periphrased (imp. & p. p.) of Periphrase.
Periphrasing (p. pr. & vb. n.) of Periphrase.
Periphrase (v. t.) 轉彎抹角地說；迂回地說 To express by periphrase or circumlocution.
Periphrase (v. i.) To use circumlocution.
Compare: Circumlocution
Circumlocution (n.) 迂回累贅的話（使用不必要的、囉嗦的、迂回的語言） A style that involves indirect ways of expressing things.
Circumlocution (n.) An indirect way of expressing something.
Periphrase (n.) (Rhet.) The use of more words than are necessary to express the idea; a roundabout, or indirect, way of speaking; circumlocution. "To describe by enigmatic periphrases." -- De Quincey.