Atrium

An Illustrated Dictionary of Medicine, Biology and Allied Sciences · 1907 · p. 4

i a'-tre-um. I. That part of the auricle of the heart into which the venous blood is poured. 2. The principal part of the tympanic cavity of the ear, exclusive of the attic. A. cord is, the auricle of the heart. A. vaginae, the vestibule of the vulva.