coelenteron

English Thesaurus

1. the saclike body cavity of a coelenterate (noun.animal)

hypernym	:	sac,
definition	:	a structure resembling a bag in an animal (noun.body)

part meronym	:	cnidarian, coelenterate,
definition	:	radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms (noun.animal)