adjective Anatomy.
of or pertaining to the atria and ventricles of the heart. Abbreviation: AV, A-V

1855–60; < Neo-Latin atrio- (combining form of atrium heart chamber; see atrium, -o-) + ventricular Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
atrioventricular (ˌeɪtrɪəʊvɛnˈtrɪkjʊlə)
of, relating to, or affecting both the atria and the ventricles of the heart: atrioventricular disease
[C19: from atrio-, from New Latin atrium heart chamber (see atrium) + ventricular]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

atrioventricular a·tri·o·ven·tric·u·lar (ā'trē-ō-věn-trĭk'yə-lər)
Abbr. A-V
Of or relating to the atria and the ventricles of the heart.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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