atrioventricular

[ey-tree-oh-ven-trik-yuh-ler] /ˌeɪ tri oʊ vɛnˈtrɪk yə lər/
adjective, Anatomy
1.
of or pertaining to the atria and ventricles of the heart.
Abbreviation: AV, A-V.
Origin
1855-60; < Neo-Latin atrio- (combining form of atrium heart chamber; see atrium, -o-) + ventricular
British Dictionary definitions for atrioventricular

atrioventricular

/ˌeɪtrɪəʊvɛnˈtrɪkjʊlə/
adjective (anatomy)
1.
of, relating to, or affecting both the atria and the ventricles of the heart: atrioventricular disease
Word Origin
C19: from atrio-, from New Latin atrium heart chamber (see atrium) + ventricular
atrioventricular in Medicine

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