Answer: antrum

AnswerCrossword Clue
ANTRUMAnatomical cavity
ANTRUMBone cavity
ANTRUMCave or cavity.
ANTRUMSinus cavity
ANTRUMCavity in a body organ
ANTRUMBiological cavity
antrumcavity in a body organ, esp. a bone
antruma cavity in a bone