'Somatocyst' definitions:

Definition of 'Somatocyst'

From: GCIDE

Somatocyst \So"ma*to*cyst\, n. [Gr. sw^ma, sw`matos, body + ky`stis a bladder.] (Zool.) A cavity in the primary nectocalyx of certain Siphonophora. See Illust. under Nectocalyx. [1913 Webster]