| uranium |
a radioactive chemical element that has ninety-two protons in each nucleus and that occurs in pure form as a heavy silvery-white metal, used as a fissionable nuclear fuel. (symbol: U) |
| Uranus |
the third largest planet in the solar system and seventh from the sun, having twenty-seven satellites and a diameter of about 31,500 miles. [2 definitions] |
| urate |
a salt of uric acid. |
| urban |
of or pertaining to a city or town. [3 definitions] |
| urbane |
refined in manner; polished; elegant. |
| urbanism |
the culture or way of life of city dwellers. |
| urbanite |
one who lives in a city. |
| urbanity |
refined politeness; elegant courtesy. [2 definitions] |
| urbanization |
the process by which the population in cities and towns grows as people leave rural areas for urban areas. [2 definitions] |
| urbanize |
to make urban, as an area or locale. |
| urbanology |
the study of the social problems of cities. |
| urban renewal |
the renewing of deteriorating parts of a town or city, by renovation or new construction. |
| urban spadeleaf |
a small creeping plant used in herbal medicine; Centella. |
| urban sprawl |
spreading of the urban structure into adjoining suburbs and rural areas. |
| urchin |
a small child, esp. a poor, mischievous, or dirty boy. [2 definitions] |
| Urdu |
the official literary language of Pakistan, written with Persian-Arabic characters, and widely used by Muslims in India. |
| -ure |
act or process. [3 definitions] |
| urea |
a soluble nitrogen compound found in the urine of mammals, and synthesized from carbon dioxide and ammonia for use in fertilizers, animal feeds, and other products. |
| uremia |
a toxic condition resulting from the retaining in the blood of wastes that normally are evacuated in urine. |
| ureter |
a narrow duct through which urine moves from the kidney to the bladder or cloaca. |
| urethane |
any of several compounds derived from carbamic acid; ethyl carbamate. [2 definitions] |