Douglas Harper's Etymology Dictionary
coelomate
1883, from Coelomata (1877), from Modern Latin neuter plural of coelomatus, from Greek koilomat- "hollow, cavity," from PIE root *kel- (2) "to cover, conceal" (see cell).
Wiktionary
coelomate
a. (context zoology English) Having a coelom. alt. (context zoology English) Any animal possessing a fluid-filled cavity within which the digestive system is suspended. n. (context zoology English) Any animal possessing a fluid-filled cavity within which the digestive system is suspended.
Usage examples of "coelomate".
But cousin roundworm, one of the coelomates, grew plump and solid, because his blood vessels fed his specialized interior cells, which would otherwise have no access to food.