atrium

• ⇰ प्रांगण

• ⇰ A square hall lighted from above, into which rooms open at one or more levels.
• ⇰ The main part of either auricle of the heart as distinct from the auricular appendix. Also, the whole articular portion of the heart.
• ⇰ A cavity in ascidians into which the intestine and generative ducts open, and which also receives the water from the gills. See Ascidioidea>.
• ⇰ A cavity, entrance, or passage; <as>as, the <ex>atrium</ex>, or atrial cavity, in the body wall of the amphioxus; an <ex>atrium</ex> of the infundibula of the lungs, etc.</as>