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continental United States.

conus arteriosus

[koh-nuh s ahr-teer-ee-oh-suh s] /ˈkoʊ nəs ɑrˌtɪər iˈoʊ səs/
noun, plural coni arteriosi
[koh-nahy ahr-teer-ee-oh-sahy, koh-nee ahr-teer-ee-oh-see] /ˈkoʊ naɪ ɑrˌtɪər iˈoʊ saɪ, ˈkoʊ ni ɑrˌtɪər iˈoʊ si/ (Show IPA).
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.
Also called conus.
Origin of conus arteriosus
1855-60; < New Latin: literally, arterial cone. See arterio-, cone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for CONUS


noun (pl) -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
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Word Origin and History for CONUS



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

Online Etymology Dictionary, © 2010 Douglas Harper
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CONUS in Medicine

conus co·nus (kō'nəs)
n. pl. co·ni (-nī')

  1. Cone.

  2. Posterior staphyloma in myopic choroidopathy.

conus arteriosus conus ar·te·ri·o·sus (är-tēr'ē-ō'səs)
A conical extension of the right ventricle in the heart, from which the pulmonary artery originates. Also called arterial cone, infundibulum.

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