Urao, ōō-rä′ō, n. the natron found in the dried-up beds of South American lakes and streams.
Urate, ū′rāt, n. a salt of uric acid.—adj. Urat′ic, pertaining to the urates.—ns. Uratō′ma, a deposit of urates in the tissues; Uratō′sis, a morbid condition in which this takes place.
Urban, ur′ban, adj. of or belonging to a city.—adj. Urbāne′, pertaining to, or influenced by, a city: civilised: refined: courteous.—adv. Urbāne′ly.—n. Urban′ity, the quality of being urbane: refinement: politeness.—Urbi et orbi='to the city and to the world,' a form used in the publication of papal bulls, for the purpose of signifying their formal promulgation to the entire Catholic world, as well as to the city of Rome. [L. urbanus—urbs, a city.]
Urceolus, ur-sē′ō-lus, n. a monopetalous corolla with a contracted orifice: the external case or sheath of a rotifer.—n. Urcēōlā′ria, a genus of gymnocarpous lichens with urceolate apothecia.—adjs. Urceolā′rian; Ur′ceolāte, pitcher-shaped: having an urceolus, as a rotifer.—n. Ur′ceus, a ewer for holding water for washing. [L. urceolus, dim. of urceus, a pitcher.]
Urchin, ur′chin, n. a hedgehog: a mischievous child, an elf, fairy.—adj. elfish, mischievous. [O. Fr. eriçon (Fr. hérisson)—L. ericius, a hedgehog.]
Urdé, ur-dā′, adj. (her.) pointed, as a cross, or having a point projected, as a bend: varriated. [Fr.,—Old High Ger. ort, a point.]
Urdú, ōōr′dōō, n. Hindustani, a peculiar and important form of Hindi—now a kind of lingua franca for the whole of India.
Ure, ūr, n. (obs.) practice, operation.—v.t. and v.i. to work, exercise.
Urea, ū′rē-a, n. a readily soluble colourless crystalline compound formed in the tissues during the disintegration of proteid material, and carried by the blood to the kidneys, which separate it and pass it off in the urine.—adj. U′rēal, pertaining to urea.—ns. Uream′eter, an instrument for measuring the amount of urea in in urine; Uream′etry. [Gr. ouron, urine.]
Uredo, ū-rē′dō, n. a form-genus or stage of fungi of order Uredineæ.—adjs. Uredin′eous, Ured′inous; Urē′doform.—n. Urē′dospore.—adj. Uredospor′ic.