| Words | Parts of Speech | Meaning/Definition/Similar Words |
|---|---|---|
| uraeum | noun | The posterior half of an animal. |
| uralic | adjective | Of or relating to the Ural Mountains. |
| uramil | noun | Murexan. |
| urania | noun | One of the nine Muses, daughter of Zeus by Mnemosyne, and patron of astronomy., A genus of large, brilliantly colored moths native of the West Indies and South America. Their bright colored and tailed hind wings and their diurnal flight cause them to closely resemble butterflies. |
| uranic | adjective | Of or pertaining to the heavens; celestial; astronomical., Pertaining to, resembling, or containing uranium; specifically, designating those compounds in which uranium has a valence relatively higher than in uranous compounds. |
| uranin | noun | An alkaline salt of fluorescein, obtained as a brownish red substance, which is used as a dye; — so called from the peculiar yellowish green fluorescence (resembling that of uranium glass) of its solutions. See Fluorescein. |
| uranus | noun | The son or husband of Gaia (Earth), and father of Chronos (Time) and the Titans., One of the primary planets. It is about 1,800,000,000 miles from the sun, about 36,000 miles in diameter, and its period of revolution round the sun is nearly 84 of our years. |
| uranyl | noun | The radical UO2, conveniently regarded as a residue of many uranium compounds. |
| uratic | Of or containing urates; as, uratic calculi. | |
| urbane | adjective | Courteous in manners; polite; refined; elegant. |
| urchin | noun | A hedgehog., A sea urchin. See Sea urchin., A mischievous elf supposed sometimes to take the form a hedgehog., A pert or roguish child; — now commonly used only of a boy., 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., Rough; pricking; piercing. |
| urchon | noun | The urchin, or hedgehog. |
| ureide | noun | Any one of the many complex derivatives of urea; thus, hydantoin, and, in an extended dense, guanidine, caffeine, et., are ureides. |
| ureter | noun | The duct which conveys the urine from the kidney to the bladder or cloaca. There are two ureters, one for each kidney. |
| uretic | adjective | Of or pertaining to the urine; diuretic; urinary; as, uretic medicine. |
| urging | present participle & vb. noun | of Urge |
| urgent | adjective | Urging; pressing; besetting; plying, with importunity; calling for immediate attention; instantly important. |
| urinal | noun | A vessel for holding urine; especially, a bottle or tube for holding urine for inspection., A place or convenience for urinating purposes. |
| urnful | noun | As much as an urn will hold; enough to fill an urn. |
| urochs | noun | See Aurochs. |
| uropod | noun | Any one of the abdominal appendages of a crustacean, especially one of the posterior ones, which are often larger than the rest, and different in structure, and are used chiefly in locomotion. See Illust. of Crustacea, and Stomapoda. |
| ursine | adjective | Of or pertaining to a bear; resembling a bear. |
| ursula | noun | A beautiful North American butterfly (Basilarchia, / Limenitis, astyanax). Its wings are nearly black with red and blue spots and blotches. Called also red-spotted purple. |
| urtica | noun | A genus of plants including the common nettles. See Nettle, n. |