noun, plural an·tra [an-truh] /ˈæn trə/. Anatomy.
a cavity in a body organ, especially a bone.
Origin of antrum
1720–30; < Latin < Greek ántron caveRelated formsan·tral, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for antrum
Historical Examples of antrum
Antrum duplicatum, 1-loculare, superne apertum, pericarpiis osseis intus nidulantibus.
We found that the tumor did extend from the antrum, into which I could bore my finger easily.
It is rarely possible to enter the antrum through its natural ostium.
In my opinion, however, it is always wiser in such cases to open the antrum.
The antrum pyloricum is small and not very distinctly marked.
British Dictionary definitions for antrum
noun plural -tra (-trə)
Derived Formsantral, adjective
anatomy a natural cavity, hollow, or sinus, esp in a bone
Word Origin for antrum
C14: from Latin: cave, from Greek antron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for antrum
"a cave or cavity," late 14c., medical Latin, from Greek antron "cave."
Online Etymology Dictionary, © 2010 Douglas Harper
n. pl. an•tra (-trə)
Related formsan′tral (-trəl) adj.
A nearly closed cavity or chamber, especially in a bone.
The pyloric end of the stomach, partially shut off during digestion from the cardiac end by sphincter muscles in the stomach wall.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.