Webster’s Revised Unabridged Dictionary · 1913
Atrium
A′tri·um, n. (Anat.) A cavity, entrance, or passage; as, the atrium, or atrial cavity, in the body wall of the amphioxus; an atrium of the infundibula of the lungs, etc.
Webster’s Revised Unabridged Dictionary · 1913
A′tri·um, n. (Anat.) A cavity, entrance, or passage; as, the atrium, or atrial cavity, in the body wall of the amphioxus; an atrium of the infundibula of the lungs, etc.