ep·i·stome /ˈɛpəˌstom/ 口上片
E·pis·to·ma Ep·i·stome n. Zoöl. (a) The region between the antennæ and the mouth, in Crustacea. (b) A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta. ◄ ►