Dictionary

antrum

noun an·trum \ˈan-trəm\
plural an·tra \-trə\

Definition of ANTRUM

:  an anatomical cavity within a bone (as the maxilla) or hollow organ (as the stomach)
an·tral \-trəl\ adjective

Origin of ANTRUM

Late Latin, from Latin, cave, from Greek antron; akin to Armenian ayr cave
First Known Use: circa 1751

antrum

noun an·trum \ˈan-trəm\   (Medical Dictionary)
plural an·tra \-trə\

Medical Definition of ANTRUM

:  a cavity within a bone (as the maxilla) or hollow organ (as the stomach)

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