Bi*sul"cous (&?;), a. [L. bisulcus; bis twice + sulcus furrow.] Bisulcate. Sir T. Browne.
Bi*sul"phate (&?;), n. [Pref. bi- + sulphate.] (Chem.) A sulphate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal sulphates; an acid sulphate.
Bi*sul"phide (&?;), n. [Pref. bi- + sulphide.] (Chem.) A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret.
Bi*sul"phite (&?;), n. (Chem.) A salt of sulphurous acid in which the base replaces but half the hydrogen of the acid; an acid sulphite.
Bi*sul"phu*ret (&?;), n. [Pref. bi- + sulphuret.] (Chem.) See Bisulphide.
Bit (&?;), n. [OE. bitt, bite, AS. bite, bite, fr. btan to bite. See Bite, n. & v., and cf. Bit a morsel.] 1. 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.