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- English Word Urostyle Definition A styliform process forming the posterior extremity of the vertebral column in some fishes and amphibians.
- English Word Urox Definition The aurochs.
- English Word Uroxanate Definition A salt of uroxanic acid.
- English Word Uroxanic Definition Pertaining to, or designating, an acid, C5H8N4O6, which is obtained, as a white crystalline substance, by the slow oxidation of uric acid in alkaline solution.
- English Word Uroxanthin Definition Same as Indican.
- English Word Urrhodin Definition Indigo red, a product of the decomposition, or oxidation, of indican. It is sometimes found in the sediment of pathological urines. It is soluble in ether or alcohol, giving the solution a beautiful red color. Also called indigrubin.
- English Word Urry Definition A sort of blue or black clay lying near a vein of coal.
- English Word Ursa Definition Either one of the Bears. See the Phrases below.
- English Word Ursal Definition The ursine seal. See the Note under 1st Seal.
- English Word Ursiform Definition Having the shape of a bear.
- English Word Ursine Definition Of or pertaining to a bear; resembling a bear.
- English Word Urson Definition The Canada porcupine. See Porcupine.
- English Word Ursuk Definition The bearded seal.
- English Word Ursula Definition 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.
- English Word Ursuline Definition One of an order of nuns founded by St. Angela Merici, at Brescia, in Italy, about the year 1537, and so called from St. Ursula, under whose protection it was placed. The order was introduced into Canada as early as 1639, and into the United States in 1727. The members are devoted entirely to education.
- English Word Ursuline Definition Of or pertaining to St. Ursula, or the order of Ursulines; as, the Ursuline nuns.
- English Word Ursus Definition A genus of Carnivora including the common bears.
- English Word Urtica Definition A genus of plants including the common nettles. See Nettle, n.
- English Word Urticaceous Definition Of or pertaining to a natural order (Urticaceae) of plants, of which the nettle is the type. The order includes also the hop, the elm, the mulberry, the fig, and many other plants.
- English Word Urtical Definition Resembling nettles; -- said of several natural orders allied to urticaceous plants.