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A bright red pigment consisting of mercuric sulphide, obtained either from the mineral cinnabar or artificially. It has a fine red color, and is much used in coloring sealing wax, in printing, etc.

An East Indian grass (Andropogon muricatus); also, its fragrant roots which are much used for making mats and screens. Also called kuskus, and khuskhus. [Sometimes written vetivert, and vitivert.]

produced as a yellow crystalline substance, and regarded as a complex derivative of barbituric acid.

Sulphuric acid; -- called also oil of vitriol. So called because first made by the distillation of green vitriol. See Sulphuric acid, under Sulphuric. [Colloq.] Blue vitriol. See under Blue. -- Green vitriol, ferrous sulphate; copperas. See under Green. -- Oil of vitriol, sulphuric or vitriolic acid; -- popularly so…

To convert into, or change to, a vitriol; to make into sulphuric acid or a sulphate.

Changed into a vitriol or a sulphate, or subjected to the action of sulphuric acid or of a sulphate; as, vitriolated potash, i. e., potassium sulphate.

iol; vitriolous; as, a vitriolic taste. Cf. Vitriol. Vitriolic acid (Old Chem.), (a) sulphuric acid. See Vitriol (b). [Colloq.]

e American black scoter. -- Whistling Dick. (Zoöl.) (a) An Australian shrike thrush (Colluricincla Selbii). (b) The song thrush. [Prov. Eng.] -- Whistling duck. (Zoöl.) (a) The golden-eye. (b) A tree duck. -- Whistling eagle (Zoöl.), a small Australian eagle (Haliastur sphenurus); -- called also whistling hawk, and l…

ellow residue when evaporated to dryness with nitric acid. Xanthine is closely related to uric acid.

A complex nitrogenous substance related to urea and uric acid, produced as a white powder; -- so called because it forms yellow salts, and because its solution forms a blue fluorescence like quinine.

A South African burrowing mammal (Suricata tetradactyla), allied to the civets. It is grayish brown, with yellowish transverse stripes on the back. Called also suricat.