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An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is us…

An extensive artificial group of birds including the wading, swimming, and cursorial birds.

A rare element of the nitrogen-phosphorus group, found combined, in vanadates, in certain minerals, and reduced as an infusible, grayish-white metallic powder. It is intermediate between the metals and the non-metals, having both basic and acid properties. Sumbol V (or Vd, rarely). Atomic weight 51.2.…

Of or pertaining to a verb; as, a verbal group; derived directly from a verb; as, a verbal noun; used in forming verbs; as, a verbal prefix. Verbal inspiration. See under Inspiration. -- Verbal noun (Gram.), a noun derived directly from a verb or verb stem; a verbal. The term is specifically applied to infinitives, an…

ing the parasitic worms, or helminths, together with the nemerteans, annelids, and allied groups. By some writers the branchiopods, the bryzoans, and the tunicates are also included. The name was used in a still wider sense by Linnæus and his followers.

A group of minerals having, a micaceous structure. They are hydrous silicates, derived generally from the alteration of some kind of mica. So called because the scales, when heated, open out into wormlike forms.

A group of butterflies including those known as virgins, or gossamer-winged butterflies.

A dyestuff of the induline group, made from aniline, and used as a substitute for indigo in dyeing wool and silk a violet-blue or a gray-blue color.

In the greater part of Russia, a division for local government consisting of a group of mirs, or village communities; a canton.

The black grouper (Epinephelus nigritus) of the southern coasts of the United States.

, a soft, bright red, pointed or tufted tumor found about the genitals, often massed into groups of large size. It is a variety of condyloma. Called also pointed wart, venereal wart. L. A. Duhring. -- Wart cress (Bot.), the swine's cress. See under Swine. -- Wart snake (Zoöl.), any one of several species of East Indi…

The Wealden group or strata.

Any of a group of three metameric hydrocarbons of the aromatic series, found in coal and wood tar, and so named because found in crude wood spirit. They are colorless, oily, inflammable liquids, C6H4.(CH3)2, being dimethyl benzenes, and are called respectively orthoxylene, metaxylene, and paraxylene. Called also xylol.…

Any one of a group of quinone compounds obtained respectively by the oxidation of certain xylidine compounds. In general they are yellow crystalline substances.

A group of butterflies in which the predominating color is yellow. It includes the common small yellow butterflies. Called also redhorns, and sulphurs. See Sulphur.

A rare element of the boron group, sometimes associated with yttrium or other related elements, as in euxenite and gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf. Yttrium.

A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89. [Written also ittrium.]

Any one of a group of bombycid moths of which the genus Zeuzera is the type. Some of these moths are of large size. The goat moth is an example.

An abundant element of the magnesium-cadmium group, extracted principally from the minerals zinc blende, smithsonite, calamine, and franklinite, as an easily fusible bluish white metal, which is malleable, especially when heated. It is not easily oxidized in moist air, and hence is used for sheeting, coating galvanized…

A rare element of the carbon-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4.