continental United States.

conus arteriosus

[koh-nuh s ahr-teer-ee-oh-suh s]

noun, plural co·ni ar·te·ri·o·si [koh-nahy ahr-teer-ee-oh-sahy, koh-nee ahr-teer-ee-oh-see] /ˈkoʊ naɪ ɑrˌtɪər iˈoʊ saɪ, ˈkoʊ ni ɑrˌtɪər iˈoʊ si/. Anatomy, Zoology.

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.

Origin of conus arteriosus

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

Also called co·nus. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for conus

British Dictionary definitions for conus


noun plural -ni

anatomy zoology any of several cone-shaped structures, such as the conus medullaris, the lower end of the spinal cord
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for conus



1885, from Latin conus "cone" (see cone).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for conus



n. pl. co•ni (-nī′)

Posterior staphyloma in myopic choroidopathy.

conus arteriosus



A conical extension of the right ventricle in the heart, from which the pulmonary artery originates.arterial cone infundibulum

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.