Also tri·cus·pi·dal. having three cusps or points, as a tooth.Compare bicuspid.
Anatomy. of, relating to, or affecting the tricuspid valve.


Anatomy. a tricuspid part, as a tooth.

Origin of tricuspid

1660–70; < Latin tricuspid- (stem of tricuspis) having three points. See tri-, cuspid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tricuspid

Historical Examples of tricuspid

  • There is no kardiae insufficiency, I think, neither mitral nor tricuspid.

    Hard Cash

    Charles Reade

  • The tricuspid valve at once closes, and blocks the way backward.

    A Practical Physiology

    Albert F. Blaisdell

  • There are but three pairs of incisor teeth in each jaw, and the upper molars are tricuspid.

  • The left-side valve is the mitral valve, that between the right auricle and ventricle the tricuspid valve.

    How it Works

    Archibald Williams

  • Gradually enlarge the opening until the chordæ tendineæ and the flaps of the tricuspid valve are seen.

    A Practical Physiology

    Albert F. Blaisdell

British Dictionary definitions for tricuspid


adjective Also: tricuspidal

  1. having three points, cusps, or segmentsa tricuspid tooth; a tricuspid valve
  2. of or relating to such a tooth or valve


a tooth having three cusps
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 tricuspid

1660s, from Latin tricuspidem (nominative tricuspis) "three-pointed," from tri- (see tri-) + cuspis "point" (see cusp).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for tricuspid




An organ or a part, especially a tooth, having three cusps.


Having three points, prongs, or cusps.
Of or relating to the tricuspid valve.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for tricuspid




Having three points or cusps.


A tooth having three points or cusps, especially a molar.
See tricuspid valve.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.