n. In botany, same as corm.n. In zoology, the common stock of a compound animal, as an ascidiarium, a zoanthodeme, and the like, when divided into colonies of zoöids, as may be variously effected by gemmation or other more or less complete division.n. In biology, a morphological individual or morphon of the fourth order, composed of two or more persons organically connected into a compound organism. A siphonophoran is a cormus in this sense, since its constituent members are persons; but a tree is not. Sometimes corm. See person, 8.