Webster's Unabridged Dictionary - Letter P - Page 42
Perigonium (n.) Same as Perigone.
Perigord pie () A pie made of truffles, much esteemed by epicures.
Perigraph (n.) A careless or inaccurate delineation of anything.
Perigynia (n. pl. ) of Perigynium.
Perigynium (n.) 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.) Having the ovary free, but the petals and stamens borne on the calyx; -- said of flower such as that of the cherry or peach.
Perihelia (n. pl. ) of Perihelium.
Perihelion (n.) Alt. of Perihelium.
Perihelium (n.) That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to 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}].
Perilla (n.) A genus of labiate herbs, of which one species (Perilla ocimoides, or P. Nankinensis) is often cultivated for its purple or variegated foliage.
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.) 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.
Perilymphangial (a.) Around, or at the side of, a lymphatic vessel.
Perilymphatic (a.) Pertaining to, or containing, perilymph.
Perilymphatic (a.) Perilymphangial.
Perimeter (n.) 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 (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.) A crystal of one species inclosing one of another species. See Endomorph.
Perimysial (a.) Surrounding a muscle or muscles.
Perimysial (a.) Of or pertaining to the perimysium.
Perimysium (n.) 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.) Of or pertaining to the perineum.
Perineoplasty (n.) The act or process of restoring an injured perineum.
Perineorrhaphy (n.) The operation of sewing up a ruptured perineum.
Perinephritis (n.) Inflammation of the cellular tissue around the kidney.
Perineum (n.) The region which is included within the outlet of the pelvis, and is traversed by the urinogenital canal and the rectum.
Perineurial (a.) Surrounding nerves or nerve fibers; of or pertaining to the perineurium.
Perineurium (n.) The connective tissue sheath which surrounds a bundle of nerve fibers. See Epineurium, and Neurilemma.
Perinuclear (a.) Of or pertaining to a nucleus; situated around a nucleus; as, the perinuclear protoplasm.
Period (n.) A portion of time as limited and determined by some recurring 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.
Period (n.) 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.
Period (n.) 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.
Period (n.) A complete sentence, from one full stop to another; esp., a well-proportioned, harmonious sentence.
Period (n.) The punctuation point [.] that marks the end of a complete sentence, or of an abbreviated word.
Period (n.) 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.) The time of the exacerbation and remission of a disease, or of the paroxysm and intermission.
Period (n.) A complete musical sentence.
Period (v. t.) To put an end to.
Period (v. i.) To come to a period; to conclude. [Obs.] "You may period upon this, that," etc.
Periodate (n.) 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 modern version of the periodic table can be found at: http://pearl1.lanl.gov/periodic/default.htm [PJC] Table of the periodic law of the chemical elements (The vertical columns contain the periodic groups) Series1[ 2[ 3[ 4[ 5[ 6[ 7[ 8[ 9[ 10[ 11[ 12[
--------------------------------------------------------------
|I. II. III. IV. V. VI. VII. VIII. | RH4 RH3 RH3 RH
|R2O RO R3O3 RO2 R2O5 RO3 R2O7 RO4
--------------------------------------------------------------
H
1
Li
7
Na
23
K
39
(Cu)
63
Rb
85.2
(Ag)
(108)
Cs
133
(-)
(-)
(Au)
(197)
--------------------------------------------------------------
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.
Periodical (n.) 期刊 [C] A magazine or other publication which appears at stated or regular intervals.
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.) 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.
Periodic (a.) Recurring or reappearing from time to time; "periodic feelings of anxiety" [syn: {periodic}, {occasional}].
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.) A table or other means for calculating the periodical functions of women.
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.) The external smooth horny layer of the hoof of the horse and allied animals.
Perioplic (a.) Of or pertaining to the periople; connected with the periople.
Periosteal (a.) Situated around bone; of or pertaining to the periosteum.
Periosteum (n.) The membrane of fibrous connective tissue which closely invests all bones except at the articular surfaces.
Periostitis (n.) Inflammation of the periosteum.
Periostraca (n. pl. ) of Periostracum.
Periostracum (n.) A chitinous membrane covering the exterior of many shells; -- called also epidermis.
Periotic (a.) Surrounding, or pertaining to the region surrounding, the internal ear; as, the periotic capsule.
Periotic (n.) A periotic bone.
Peripatecian (n.) A peripatetic.
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.
Peripatetic (n.) One who walks about; a pedestrian; an itinerant.
Peripatetic (n.) A disciple of Aristotle; an Aristotelian.
Peripatetical (a.) Peripatetic.
Peripateticism (n.) The doctrines or philosophical system of the peripatetics. See Peripatetic, n., 2.
Peripatus (n.) A genus of lowly organized arthropods, found in South Africa, Australia, and tropical America. It constitutes the order Malacopoda.
Peripetalous (a.) 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].
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.