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A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret.

The part of a bridle, usually of iron, which is inserted in the mouth of a horse, and having appendages to which the reins are fastened. Shak. The foamy bridle with the bit of gold. Chaucer.

; to hold fast; to adhere to; as, the anchor bites the ground. The last screw of the rack having been turned so often that its purchase crumbled, . . . it turned and turned with nothing to bite. Dickens. To bite the dust, To bite the ground, to fall in the agonies of death; as, he made his enemy bite the dust. -- To b…

Not having a bit or bridle.

Having a peculiar, acrid, biting taste, like that of wormwood or an infusion of hops; as, a bitter medicine; bitter as aloes.

The brine which remains in salt works after the salt is concreted, having a bitter taste from the chloride of magnesium which it contains.

Having the qualities of bitumen; compounded with bitumen; containing bitumen. Near that bituminous lake where Sodom flamed. Milton. Bituminous coal, a kind of coal which yields, when heated, a considerable amount of volatile bituminous matter. It burns with a yellow smoky flame. -- Bituminous limestone, a mineral of a…

A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyst…

Having two valves, as the oyster and some seed pods; bivalve.

Having two valves.

Having two vaults or arches.

(Anat.) Having two bellies or protuberances; as, a biventral, or digastric, muscle, or the biventral lobe of the cerebellum.

Having, or leading, two ways. Bivious theorems and Janus-faced doctrines. Sir T. Browne.

Having black eyebrows. Hence: Gloomy; dismal; threatening; forbidding. Shak. Dryden.

Having black eyes. Dryden.

Having a black, dark, or gloomy face or aspect.

Having a wicked, malignant disposition; morally bad.

Having bladders; also, resembling a bladder.

Having a blade or blades; as a two-bladed knife. Decking with liquid pearl the bladed grass. Shak.

Having soft and soothing qualities; not drastic or irritating; not stimulating; as, a bland oil; a bland diet.