/koh"neuhs ahr tear'ee oh"seuhs/ , pl. coni arteriosi /koh"nuy ahr tear'ee oh"suy, koh"nee ahr tear'ee oh"see/ . Anat., Zool.
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. Also called conus .
[ 1855-60; ]