E*pis"to*ma (?), Ep"i*stome (?), n. [NL. epistoma, fr. Gr. upon + , , mouth.] Zool. (a)
The region between the antennae and the mouth, in Crustacea.
(b)
A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta.
© Webster 1913.