conus arteriosus

co·nus ar·te·ri·o·sus

noun \ˈkō-nəs-är-ˌtir-ē-ˈō-səs\

plural co·ni ar·te·ri·o·si\-ˌnī-är-ˌtir-ē-ˈō-ˌsī\

Definition of CONUS ARTERIOSUS

1

: a conical prolongation of the right ventricle in mammals from which the pulmonary arteries emerge —called also conus

2

: a prolongation of the ventricle of amphibians and some fishes that has a spiral valve separating venous blood going to the respiratory arteries from blood going to the aorta and systemic arteries

Origin of CONUS ARTERIOSUS

New Latin, literally, arterial cone

First Known Use: circa 1860