- continental United States.
[koh-nuh s ahr-teer-ee-oh-suh s]
- 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
Also called co·nus.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for conus
The teeth of Conus are hollow and very sharp and have a barb on the end.
With the reduction of the conus the bulbus arteriosus is enlarged.
Conus maculosus is an inhabitant of the last-named locality.Voyage Of H.M.S. Rattlesnake, Vol. 2 (of 2)
Amongst the Teleostomes the lower ganoids show a similar development of longitudinal rows of valves in the conus.
In Amia (fig. 26, B), however, the conus is shortened and the number of valves in each longitudinal row is much reduced.
- 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
- Posterior staphyloma in myopic choroidopathy.
- 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.