conus arteriosus

[koh-nuhs ahr-teer-ee-oh-suhs]

noun

Anatomy, Zoology.

plural

coni arteriosi 

1. the most anterior part of the simple tubular heart of lower vertebrates and embryos of higher vertebrates, leading into the artery that leaves the heart; in mammals it forms a part of the upper wall of the right ventricle, in which the pulmonary artery originates.

Word History and Origins

Origin of conus arteriosus¹

1855–60; < New Latin: literally, arterial cone. See arterio-, cone