Webster's Unabridged Dictionary - Letter U - Page 31
Uranyl (n.) (Chem.) The radical UO2, conveniently regarded as a residue of many uranium compounds.
Uranyl (n.) The bivalent radical UO2 which forms salts with acids [syn: uranyl, uranyl group, uranyl radical].
Trona (n.) (Chem. & Min.) A native double salt, consisting of a combination of neutral and acid sodium carbonate, Na2CO3.2HNaCO3.2H2O, occurring as a white crystalline fibrous deposit from certain soda brine springs and lakes; -- called also urao, and by the ancients nitrum.
Urao (n.) [Sp.] (Min.) See Trona. Urare
Urare (n.) Alt. of Urari.
Urari (n.) See Curare.
Urate (n.) (Physiol. Chem.) A salt of uric acid; as, sodium urate; ammonium urate.
Urate (n.) A salt of uric acid.
Uratic () (Physiol. Chem.) Of or containing urates; as, uratic calculi.
Urban (a.) Of or belonging to a city or town; as, an urban population.
Urban (a.) Belonging to, or suiting, those living in a city; cultivated; polite; urbane; as, urban manners.
Urban servitude. See Predial servitude, under Servitude.
Urban (a.) Relating to or concerned with a city or densely populated area; "urban sociology"; "urban development."
Urban (a.) Located in or characteristic of a city or city life; "urban property owners"; "urban affairs"; "urban manners" [ant: rural].
Urban. () Relating to a city; but in a more general sense it signifies relating to houses.
Urban. () It is used in this latter sense in the civil code of Louisiana, articles 706 and 707. All servitudes are established either for the use of houses or for the use of lands. Those of the first kind are called urban servitudes, whether the buildings to which they are due be situated in the city or in the country. Those of the second kind are called rural servitudes.
Urban. () The principal kinds of urban servitudes are the following: the right of support; that of drip; that of drain, or of preventing the drain, that of view or of lights, or of preventing the view or lights from being obstructed: that of raising buildings or walls, or of preventing them from being raised that of passage and that of drawing water. Vide 3 Toull. p. 441; Poth. Introd. au tit. 13 de la Coutume d'Orleans, n. 2; Introd. Id. n. 2.
Urbane (a.) Courteous in manners; polite; refined; elegant.
Urbane (a.) Showing a high degree of refinement and the assurance that comes from wide social experience; "his polished manner"; "maintained an urbane tone in his letters" [syn: polished, refined, svelte, urbane].
Urbane, () Courteous.
Urbane (a.) Notably polite or polished in manner.
Urbaniste (n.) (Bot.) A large and delicious pear or Flemish origin.
Urbanity (n.) The quality or state of being urbane; civility or courtesy of manners; politeness; refinement.
The marquis did the honors of his house with the urbanity of his country. -- W. Irving.
Urbanity (n.) Polite wit; facetiousness. [Obs.] -- Dryden.
Raillery in the sauce of civil entertainment; and without some such tincture of urbanity, good humor falters. -- L'Estrange.
Syn: Politeness; suavity; affability; courtesy.
Urbanity (n.) Polished courtesy; elegance of manner.
Urbanity (n.) The quality or character of life in a city or town; "there is an important difference between rusticity and urbanity" [ant: gaucherie, rusticity].
Urbanity (n.) The kind of civility that urban observers ascribe to dwellers in all cities but New York. Its commonest expression is heard in the words, "I beg your pardon," and it is not consistent with disregard of the rights of others.
The owner of a powder mill Was musing on a distant hill -- Something his mind foreboded -- When from the cloudless sky there fell A deviled human kidney! Well, The man's mill had exploded.
His hat he lifted from his head; "I beg your pardon, sir," he said; "I didn't know 'twas loaded." Swatkin
Urbanize (v. t.) To render urban, or urbane; to refine; to polish. -- Howell.
Urbanize (v.) Make more industrial or city-like; "The area was urbanized after many people moved in" [syn: urbanize, urbanise].
Urbanize (v.) Impart urban habits, ways of life, or responsibilities upon; "Birds are being urbanized by people in outdoor cafes feeding them" [syn: urbanize, urbanise].
Urban renewal (n.) 都市更新 (Also called urban regeneration in the United Kingdom and urban redevelopment in the United States [1] ) Is a program of land redevelopment in cities, often where there is urban decay. Urban renewal often refers to the clearing out of blighted areas in inner cities to clear out slums and create opportunities for higher class housing, businesses, and more. Modern attempts at renewal began in the late 19th century in developed nations, and experienced an intense phase in the late 1940s under the rubric of reconstruction. The process has had a major impact on many urban landscapes, and has played an important role in the history and demographics of cities around the world.
Urban renewal (n.) Te clearing and rebuilding and redevelopment of urban slums.
Urbicolae (n. pl.) (Zool.) An extensive family of butterflies ({Hesperidae), including those known as skippers.
Urbicolous (a.) Of or pertaining to a city; urban. [R.]
Urceolar (a.) Urceolate.
Urceolate (a.) (Nat. Hist.) Shaped like a pitcher or urn; swelling below, and contrasted at the orifice, as a calyx or corolla.
Urceole (n.) (R. C. Ch.) A vessel for water for washing the hands; also, one to hold wine or water.
Urceoli (n. pl. ) of Urceolus.
Urceolus (n.) (Bot.) Any urn-shaped organ of a plant.
Urchin (n.) (Zool.) A hedgehog.
Urchin (n.) (Zool.) A sea urchin. See Sea urchin.
Urchin (n.) A mischievous elf supposed sometimes to take the form a hedgehog. "We 'll dress [them] like urchins, ouphes, and fairies." -- Shak.
Urchin (n.) A pert or roguish child; -- now commonly used only of a boy.
And the urchins that stand with their thievish eyes Forever on watch ran off each with a prize. -- W. Howitt.
You did indeed dissemble, you urchin you; but where's the girl that won't dissemble for an husband? -- Goldsmith.
Urchin (n.) One of a pair in a series of small card cylinders, arranged around a carding drum; -- so called from its fancied resemblance to the hedgehog. -- Knight.
Urchin fish (Zool.), A diodon.
Urchin (a.) Rough; pricking; piercing. [R.] "Helping all urchin blasts." -- Milton.
Urchon (n.) (Zool.) The urchin, or hedgehog.
Urdu (n.) The language more generally called Hindustanee.
Ur, Ure , (n.) (Zool.) The urus.
Ure (n.) Use; practice; exercise. [Obs.] -- Fuller.
Let us be sure of this, to put the best in ure That lies in us. -- Chapman.
Ure (v. t.) To use; to exercise; to inure; to accustom by practice. [Obs.]
The French soldiers . . . from their youth have been practiced and ured in feats of arms. -- Sir T. More.
Urus (n.) (Zool.) A very large, powerful, and savage extinct bovine animal ({Bos urus or Bos primigenius) anciently abundant in Europe. It appears to have still existed in the time of Julius Caesar. It had very large horns, and was hardly capable of domestication. Called also, ur, ure, and tur.
Urea (a.) (Physiol. Chem.) A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc.
Note: It is the main product of the regressive metamorphosis (katabolism) of proteid matter in the body, and is excreted daily to the amount of about 500 grains by a man of average weight. Chemically it is carbamide, CO(NH2)2, and when heated with strong acids or alkalies is decomposed into carbonic acid and ammonia.
It unites with acids to form salts, as nitrate of urea, and it can be made synthetically from ammonium cyanate, with which it is isomeric.
Urea ferment, A soluble ferment formed by certain bacteria, which, however, yield the ferment from the body of their cells only after they have been killed by alcohol. It causes urea to take up water and decompose into carbonic acid and ammonia. Many different bacteria possess this property, especially Bacterium ureae and Micrococcus ureae, which are found abundantly in urines undergoing alkaline fermentation.
Ureal (a.) Of or pertaining to urea; containing, or consisting of, urea; as, ureal deposits.
Ureameter (n.) (Physiol. Chem.) An apparatus for the determination of the amount of urea in urine, in which the nitrogen evolved by the action of certain reagents, on a given volume of urine, is collected and measured, and the urea calculated accordingly.
Urechitin (n.) (Chem.) A glucoside extracted from the leaves of a certain plant (Urechitis suberecta) as a bitter white crystalline substance.
Urechitoxin (n.) (Chem.) A poisonous glucoside found accompanying urechitin, and extracted as a bitter white crystalline substance.
Uredo (n.) (Bot.) One of the stages in the life history of certain rusts (order Uredinales), regarded at one time as a distinct genus. It is a summer stage preceding the teleutospore, or winter stage. See Uredinales, in the Supplement.
Uredo (n.) (Med.) Nettle rash. See Urticaria.
Uredospore (n.) (Bot.) The thin-walled summer spore which is produced during the so-called Uredo stage of certain rusts. See (in the Supplement) Uredinales, Heter[oe]cious, etc.
Ureide (n.) (Chem.) Any one of the many complex derivatives of urea; thus, hydantoin, and, in an extended dense, guanidine, caffeine, et., are ureides. [Written also ureid.]
-uret () A suffix with the same meaning as -ide. See -ide. [Obs.]
Ureter (n.) (Anat.) The duct which conveys the urine from the kidney to the bladder or cloaca. There are two ureters, one for each kidney.
Ureter (n.) Either of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladder.
Ureteritis (n.) (Med.) Inflammation of the ureter. -- Dunglison.
Ureteritis (n.) Inflammation of the ureter.
Urethane (n.) (Org. Chem.) A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate or by heating urea nitrate and ethyl alcohol. It is used as a hypnotic, antipyretic, and antispasmodic.
Hence, any ester of carbamic acid.
Urethane (n.) Same as polyurethane.
Urethane (n.) An ester of carbamic acid.
Urethra (n.) (Anat.) 【解】尿道 The canal by which the urine is conducted from the bladder and discharged.
Urethra (n.) Duct through which urine is discharged in most mammals and which serves as the male genital duct.
Urethral (a.) 尿道的 Of or pertaining to the urethra.
Urethral fever (Med.), Fever occurring as a consequence of operations upon the urethra.
Urethral (a.) Of or relating to the urethra.
Urethritis (n.) (Med.) Inflammation of the urethra.
Urethritis (n.) Inflammation of the urethra; results in painful urination.
Urethroplasty (n.) (Surg.) An operation for the repair of an injury or a defect in the walls of the urethra. -- U*re`thro*plas"tic, a.
Urethroscope (n.) (Med.) An instrument for viewing the interior of the urethra.
Urethroscopy (n.) (Med.) Examination of the urethra by means of the urethroscope.
Urethrotome (n.) An instrument for cutting a urethral stricture.
Urethrotomy (n.) (Surg.) An incision of the urethra, esp. incision for relief of urethral stricture.
Uretic (a.) (Med.) Of or pertaining to the urine; diuretic; urinary; as, uretic medicine.
Urge (v. i.) To press onward or forward. [R.]
Urge (v. i.) 極力主張；強烈要求 To be pressing in argument; to insist; to persist.
Urged (imp. & p. p.) of Urge.
Urging (p. pr. & vb. n.) of Urge.
Urge (v. t.) 催促；力勸；激勵；慫恿 [O2]；極力主張；強烈要求 [（+on）] [+that] To press; to push; to drive; to impel; to force onward.
Through the thick deserts headlong urged his flight. -- Pope.
Urge (v. t.) To press the mind or will of; to ply with motives, arguments, persuasion, or importunity.
My brother never Did urge me in his act; I did inquire it. -- Shak.
Urge (v. t.) To provoke; to exasperate. [R.]
Urge not my father's anger. -- Shak.
Urge (v. t.) To press hard upon; to follow closely.
Heir urges heir, like wave impelling wave. -- Pope.
Urge (v. t.) To present in an urgent manner; to press upon attention; to insist upon; as, to urge an argument; to urge the necessity of a case.
Urge (v. t.) To treat with forcible means; to take severe or violent measures with; as, to urge an ore with intense heat.
Syn: To animate; incite; impel; instigate; stimulate; encourage.
Urge (n.) An instinctive motive; "profound religious impulses" [syn: urge, impulse].
Urge (n.) 強烈的慾望；衝動；迫切的要求 [the S]；推動力 A strong restless desire; "why this urge to travel?" [syn: urge, itch].
Urge (v.) Force or impel in an indicated direction; "I urged him to finish his studies" [syn: urge, urge on, press, exhort].
Urge (v.) Push for something; "The travel agent recommended strongly that we not travel on Thanksgiving Day" [syn: recommend, urge, advocate].
Urge (v.) Spur on or encourage especially by cheers and shouts; "The crowd cheered the demonstrating strikers" [syn: cheer, root on, inspire, urge, barrack, urge on, exhort, pep up].
Urgence (n.) Urgency. [Obs.]
Urgency (n.) The quality or condition of being urgent; insistence; pressure; as, the urgency of a demand or an occasion.
Urgency (n.) The state of being urgent; an earnest and insistent necessity.
Urgency (n.) Pressing importance requiring speedy action; "the urgency of his need."
Urgency (n.) An urgent situation calling for prompt action; "I'll be there, barring any urgencies"; "they departed hurriedly because of some great urgency in their affairs".
Urgency (n.) Insistent solicitation and entreaty; "his importunity left me no alternative but to agree" [syn: importunity, urgency, urging].
Urgent (a.) Urging; pressing; besetting; plying, with importunity; calling for immediate attention; instantly important. "The urgent hour." -- Shak.
Some urgent cause to ordain the contrary. -- Hooker.
The Egyptians were urgent upon the people that they might send them out of the land in haste. -- Ex. xii. 33.
Urgent (a.) Compelling immediate action; "too pressing to permit of longer delay"; "the urgent words `Hurry! Hurry!'"; "bridges in urgent need of repair" [syn: pressing, urgent].
Urgently (adv.) In an urgent manner.
Urgently (adv.) With great urgency; "health care reform is needed urgently"; "the soil desperately needed potash" [syn: urgently, desperately].
Urger (n.) One who urges. -- Beau. & Fl.
Pyrotritartaric (a.) (Chem.) Designating an acid which is more commonly called uric acid.
Uric (a.) (Physiol. Chem.) Of or pertaining to urine; obtained from urine; as, uric acid.
Uric acid, () A crystalline body, present in small quantity in the urine of man and most mammals. Combined in the form of urate of ammonia, it is the chief constituent of the urine of birds and reptiles, forming the white part. Traces of it are also found in the various organs of the body. It is likewise a common constituent, either as the free acid or as a urate, of urinary or renal calculi and of the so-called gouty concretions. From acid urines, uric acid is frequently deposited, on standing in a cool place, in the form of a reddish yellow sediment, nearly always crystalline. Chemically, it is composed of carbon, hydrogen, nitrogen, and oxygen, C5H4N4O3, and by decomposition yields urea, among other products. It can be made synthetically by heating together urea and glycocoll. It was formerly called also lithic acid, in allusion to its occurrence in stone, or calculus.
Uric (a.) In or relating to or obtained from urine; "uric acid."
Urim (n.) A part or decoration of the breastplate of the high priest among the ancient Jews, by which Jehovah revealed his will on certain occasions. Its nature has been the subject of conflicting conjectures.
Thou shall put in the breastplate of judgment the Urim and the Thummim. -- Ex. xxviii. 30.
And when Saul inquired of the Lord, the Lord answered him not, neither by dreams, nor by Urim, nor by prophets. -- 1 Sam. xxviii. 6.
Note: Professor Plumptre supposes the Urim to have been a clear and colorless stone set in the breastplate of the high priest as a symbol of light, answering to the mystic scarab in the pectoral plate of the ancient Egyptian priests, and that the Thummim was an image corresponding to that worn by the priestly judges of Egypt as a symbol of truth and purity of motive. By gazing steadfastly on these, he may have been thrown into a mysterious, half ecstatic state, akin to hypnotism, in which he lost all personal consciousness, and received a spiritual illumination and insight.
Urim, () Lights (Vulg."doctrina;" LXX. "revelation"). See THUMMIM.
Urim, lights; fires.
Urinal (n.) A vessel for holding urine; especially, a bottle or tube for holding urine for inspection.
Urinal (n.) A place or convenience for urinating purposes.
Urinal (n.) A plumbing fixture (usually attached to the wall) used by men to urinate.
Urinarium (n.) (Agric.) A reservoir for urine, etc., for manure.
Urinary (a.) Of or pertaining to the urine; as, the urinary bladder; urinary excretions.
Urinary (a.) Resembling, or being of the nature of, urine.
Urinary calculus (Med.), A concretion composed of some one or more crystalline constituents of the urine, liable to be found in any portion of the urinary passages or in the pelvis of the kidney.
Urinary pigments, (Physiol. Chem.), Certain colored substances, urochrome, or urobilin, uroerythrin, etc., present in the urine together with indican, a colorless substance which by oxidation is convertible into colored bodies.
Urinary (n.) A urinarium; also, a urinal.
Urinary (a.) Of or relating to the function or production or secretion of urine.
Urinary (a.) Of or relating to the urinary system of the body.
Urinate (v. i.) 小便，撒尿 To discharge urine; to make water.
Urinate (v.) Pass after the manner of urine; "The sick men urinated blood."
Urinate (v.) Eliminate urine; "Again, the cat had made on the expensive rug" [syn: {make}, {urinate}, {piddle}, {puddle}, {micturate}, {piss}, {pee}, {pee-pee}, {make water}, {relieve oneself}, {take a leak}, {spend a penny}, {wee}, {wee-wee}, {pass water}].
Urinate (v.) [ I ] 排尿，小便 To pass urine from the body.
Urination (n.) 撒尿 The act or process of voiding urine; micturition.
Urination (n.) The discharge of urine [syn: {micturition}, {urination}].
Urination (n.) [ U ] (Specialized) 撒尿 The passing of urine from the body.
// Painful urination.
Urinative (a.) Provoking the flow of urine; uretic; diuretic. [R.] -- Bacon.
Urinator (n.) One who dives under water in search of something, as for pearls; a diver. [R.] -- Ray.
Urinator (n.) A person who urinates [syn: pisser, urinator].
Urine (n.) 小便，尿 In mammals, a fluid excretion from the kidneys; in birds and reptiles, a solid or semisolid excretion.
Note: In man, the urine is a clear, transparent fluid of an amber color and peculiar odor, with an average density of 1.02. The average amount excreted in 24 hours is from 40 to 60 ounces (about 1,200 cubic centimeters). Chemically, the urine is mainly an aqueous solution of urea, salt (sodium chloride), and uric acid, together with some hippuric acid and peculiar pigments. It usually has an acid reaction, owing to the presence of acid phosphates of soda or free uric acid. Normally, it contains about 960 parts of water to 40 parts of solid matter, and the daily average excretion is 35 grams (540 grains) of urea, 0.75 gram (11 grains) of uric acid, and 16.5 grams (260 grains) of salt. Abnormally, it may contain sugar as in diabetes, protein as in Bright's disease, bile pigments as in jaundice, or abnormal quantities of some one or more of the normal constituents.
Urine (v. i.) To urinate. [Obs.] -- Bacon.
Urine (n.) Liquid excretory product; "there was blood in his urine"; "the child had to make water" [syn: {urine}, {piss}, {pee}, {piddle}, {weewee}, {water}].
Urine (n.) [ U ] 尿液，小便 The yellowish liquid waste that is released from the body when you urinate. [syn: {pee}, {piddle}, {piss}, {water}, {weewee}]
Uriniferous (a.) Bearing or conveying urine; as, uriniferous tubules.
Uriniparous (a.) (Physiol.) Producing or preparing urine; as, the uriniparous tubes in the cortical portion of the kidney.
Urinogenital (a.) (Anat.) Pertaining to the urinary and genital organs; genitourinary; urogenital; as, the urinogenital canal.
Urinometer (n.) A small hydrometer for determining the specific gravity of urine.
Urinometry (n.) The estimation of the specific gravity of urine by the urinometer. Urinose
Urinose (a.) Alt. of Urinous.
Urinous (a.) Of or pertaining to urine, or partaking of its qualities; having the character or odor of urine; similar to urine. -- Arbuthnot.
Urite (n.) (Zool.) One of the segments of the abdomen or post-abdomen of arthropods.
Urith (n.) The bindings of a hedge. [Obs. or Prov. Eng.] -- Halliwell.
Urn (n.) A vessel of various forms, usually a vase furnished with a foot or pedestal, employed for different purposes, as for holding liquids, for ornamental uses, for preserving the ashes of the dead after cremation, and anciently for holding lots to be drawn.
A rustic, digging in the ground by Padua, found an urn, or earthen pot, in which there was another urn. -- Bp. Wilkins.
His scattered limbs with my dead body burn, And once more join us in the pious urn. -- Dryden.
Urn (n.) Fig.: Any place of burial; the grave.
Or lay these bones in an unworthy urn, Tombless, with no remembrance over them. -- Shak.
Urn (n.) (Rom. Antiq.) A measure of capacity for liquids, containing about three gallons and a haft, wine measure. It was haft the amphora, and four times the congius.
Urn (n.) (Bot.) A hollow body shaped like an urn, in which the spores of mosses are contained; a spore case; a theca.
Urn (n.) A tea urn. See under Tea.
Urn mosses (Bot.), The order of true mosses; -- so called because the capsules of many kinds are urn-shaped.
Urn (v. t.) To inclose in, or as in, an urn; to inurn.
When horror universal shall descend, And heaven's dark concave urn all human race. -- Young.
Urn (n.) A large vase that usually has a pedestal or feet.
Urn (n.) A large pot for making coffee or tea.
URN, () Uniform Resource Name (WWW, RFC 1737)
Uniform Resource Name
URN
(URN, previously Uniform/Universal Resource Number) Any URI which is not a URL.
Uniform Resource Name
URN
A particular scheme which is currently (1991-4) under development by the IETF, which should provide for the resolution using Internet protocols of names which have a greater persistence than that currently associated with Internet host names or organisations (as used in URLs).
Uniform Resource Names will be URI schemes that improve on URLs in reliability over time, including authenticity, replication, and high availability.
When defined, a URN in sense 1 will be an example of a URN in sense 2.
(2006-04-18)
Urnal (a.) Of or pertaining to an urn; effected by an urn or urns. "Urnal interments." -- Sir T. Browne.
Urnfuls (n. pl. ) of Urnful.
Urnful (n.) As much as an urn will hold; enough to fill an urn.
Urn-shaped (a.) Having the shape of an urn; as, the urn-shaped capsules of some mosses.
Urn-shaped (a.) Having a concave shape like an urn.