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antrums

Variant of antrum

noun pl. antra or antrums

Anat. a cavity, esp. one within a bone, as either of a pair of sinuses in the upper jaw

Origin: L < Gr antron, cave < IE *antrom

Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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