/ Dictionary / Index A atrioventricular: Meaning and Definition of Find definitions for: a•tri•o•ven•tric•u•lar Pronunciation: (ā"trē-ō-ven-trik'yu-lur), [key] — adj. Anat. of or pertaining to the atria and ventricles of the heart. Abbr.: AV, A-V Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: atrioventricular (Thesaurus) atrichia atrioventricular bundle, Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language