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noun, plural ul·nae [uhl-nee] /ˈʌl ni/, ul·nas.
  1. Anatomy. the bone of the forearm on the side opposite to the thumb.Compare radius(def 7).
  2. a corresponding bone in the forelimb of other vertebrates.

Origin of ulna

1835–45; < Latin: elbow; akin to Greek ōlénē, Old English eln ell2
Related formsul·nar, adjectivepost·ul·nar, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ulnar

Historical Examples

  • The ulnar, both of which ought to be rather to the inside of the artery.

    A Manual of the Operations of Surgery</p>

    Joseph Bell

  • The ulnar articular facet is to be snipped off with bone-pliers.

  • Ulnar was short and squat, his cheeks were flat, his nose hooked.

    Sinister Paradise

    Robert Moore Williams

  • As he spoke, Ulnar grunted a single sound that set the girl into motion.

    Sinister Paradise

    Robert Moore Williams

  • He was moving with Rozeno and Ulnar through another opening.

    Sinister Paradise

    Robert Moore Williams

British Dictionary definitions for ulnar


noun plural -nae (-niː) or -nas
  1. the inner and longer of the two bones of the human forearm
  2. the corresponding bone in other vertebrates
Derived Formsulnar, adjective

Word Origin

C16: from Latin: elbow, ell 1
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 ulnar



inner bone of the forearm, 1540s, Latin, literally "elbow;" related to Old English eln (see elbow (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

ulnar in Medicine


([object Object])
n. pl. ul•nas
  1. The larger bone of the two bones of the forearm, extending from elbow to wrist on the side opposite the thumb.cubitus elbow bone
Related formsulnar adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ulnar in Science


Plural ulnas ulnae (ŭl)
  1. The longer of the two bones of the forearm or lower portion of the foreleg. See more at skeleton.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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