coelom
Concise Oxford English Dictionary © 2008 Oxford University Press:
coelom /ˈsiːləm/
▶noun (pl. coeloms or coelomata /-ˈləʊmətə/) Zoology the principal body cavity in most animals, located between the intestinal canal and the body wall.
– derivatives
coelomate adjective & noun,
coelomic /səˈlɒmɪk/ adjective.
coelomate adjective & noun,
coelomic /səˈlɒmɪk/ adjective.
– origin C19: from Gk koilōma ‘cavity’.
'coelom' also found in these Oxford entries:

