n. A black secretion or ink produced by the cuttlefish; also, in the arts, a pigment prepared from this substance.n. [capitalized] [NL.] A genus of cuttles, typical of the family Scpiidæ, and containing such species, as the common or officinal cuttle, S. officinalis. See also cuts under cuttlefish, Dibranchiata, and ink-bag.n. A cuttlefish.n. Cuttlebone: more fully called os sepiæ. It is an antacid, used in dentifrices, and given to canaries. See os and sepiost.