1. A kind of unraised bread, of many varieties, plain, sweet, or fancy, formed into flat cakes, and bakes hard; as, ship biscuit. According to military practice, the bread or biscuit of the romans was twice prepared in the oven. (Gibbon)
4. A species of white, unglazed porcelain, in which vases, figures, and groups are formed in miniature. Meat biscuit, an alimentary preparation consisting of matters extracted from meat by boiling, or of meat ground fine and combined with flour, so as to form biscuits.