amniotic cavity

English Thesaurus

1. the fluid-filled cavity that surrounds the developing embryo (noun.body)

hypernym	:	bodily cavity, cavity, cavum,
definition	:	(anatomy) a natural hollow or sinus within the body (noun.body)

part holonym	:	amnionic fluid, amniotic fluid, waters,
definition	:	the serous fluid in which the embryo is suspended inside the amnion (noun.body)