URSA n.
Either one of the Bears. See the Phrases below. Ursa Major Etym: [L.], the Great Bear, one of the most conspicuous of the northern constellations. It is situated near the pole, and contains the stars which form the Dipper, or Charles's Wain, two of which are the Pointers, or stars which point towards the North Star. -…
VACUUM n.
The condition of rarefaction, or reduction of pressure below that of the atmosphere, in a vessel, as the condenser of a steam engine, which is nearly exhausted of air or steam, etc.; as, a vacuum of 26 inches of mercury, or 13 pounds per square inch. Vacuum brake, a kind of continuous brake operated by exhausting the a…
VEGETABLE a.
table alkali (Chem.), an alkaloid. -- Vegetable brimstone. (Bot.) See Vegetable sulphur, below. -- Vegetable butter (Bot.), a name of several kinds of concrete vegetable oil; as that produced by the Indian butter tree, the African shea tree, and the Pentadesma butyracea, a tree of the order Guttiferæ, also African. S…
VERTEBRATA n.
al, or neural, cavity above the notochord or backbone, and a ventral, or visceral, cavity below it. The subdivisions or classes of Vertebrata are Mammalia, Aves, Reptilia, Amphibia, Pisces, Marsipobranchia, and Leptocardia.
VERTICAL a.
tion, or altitude, when reckoned from the horizon upward, and of depression when downward below the horizon. -- Vertical anthers (Bot.), such anthers as stand erect at the top of the filaments. -- Vertical circle (Astron.), an azimuth circle. See under Azimuth. -- Vertical drill, an drill. See under Upright. -- Ver…
VISION n.
stron.), the arc which measures the least distance from the sun at which, when the sun is below the horizon, a star or planet emerging from his rays becomes visible. -- Beatific vision (Theol.), the immediate sight of God in heaven. -- Direct vision (Opt.), vision when the image of the object falls directly on the ye…
WALKING n.
e, a kind of traveling crane. See under Crane. -- Walking fern. (Bot.) See Walking leaf, below. -- Walking fish (Zoöl.), any one of numerous species of Asiatic fishes of the genus Ophiocephalus, some of which, as O. marulius, become over four feet long. They have a special cavity over the gills lined with a membrane…
WATCH n.
a case for holding a watch, or in which it is kept. -- Watch chain. Same as watch guard, below. -- Watch clock, a watchman's clock; see under Watchman. -- Watch fire, a fire lighted at night, as a signal, or for the use of a watch or guard. -- Watch glass. (a) A concavo-convex glass for covering the face, or dial,…
WAY n.
Right of way. See below. By the way, in passing; apropos; aside; apart from, though connected with, the main object or subject of discourse. -- By way of, for the purpose of; as being; in character of. -- Covert way. (Fort.) See Covered way, under Covered. -- In the family way. See under Family. -- In the way, so a…
WEATHER n.
inancially embarrassed. [Colloq. U. S.] Bartlett. -- Weather box. Same as Weather house, below. Thackeray. -- Weather breeder, a fine day which is supposed to presage foul weather. -- Weather bureau, a popular name for the signal service. See Signal service, under Signal, a. [U.S.] -- Weather cloth (Naut.), a long p…