Medical Dictionary

antrum an·trum (ān'trəm)
n. pl. an·tra (-trə)

  1. A nearly closed cavity or chamber, especially in a bone.

  2. The pyloric end of the stomach, partially shut off during digestion from the cardiac end by sphincter muscles in the stomach wall.

an'tral (-trəl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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