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[trok-lee-uh] /ˈtrɒk li ə/
noun, plural trochleae
[trok-lee-ee] /ˈtrɒk liˌi/ (Show IPA),
trochleas. Anatomy.
a pulleylike structure or arrangement of parts.
Origin of trochlea
1685-95; < Latin: pulley block or sheave < Greek trochiléa, trochil(e)ía; akin to tróchilos sheave, runner, akin to tréchein to run Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for trochlea
Historical Examples
  • In the human skeleton, the internal lip of the trochlea descends lower than the external; and also lower than the condyle.

  • In the ox and the sheep, the condyle is lower than the trochlea, but only very little lower.

  • In man, the external lip of the trochlea reaches higher than the internal, and it is more prominent in front.

  • There is another modification in regard to the prominence and extent of the two lips of the trochlea.

  • We have just said that the trochlea is continuous without interruption with the condyles; this is accurate.

  • The internal lip of the trochlea is much thicker and much more prominent than the external.

  • The trochlea, narrow as a whole, is clearly separate from the condyles by a very marked constriction.

  • It articulates with the tibia by a trochlea that occupies not only the superior surface, but also the anterior.

  • The Knee Joint is a hinge formed by the condyles and trochlea of the femur, the patella, and the head of the tibia.

  • The trochlea (fig. 77, 5) at the distal end of the bone is a pulley-like surface, elevated at the sides and grooved in the middle.

    The Vertebrate Skeleton Sidney H. Reynolds
British Dictionary definitions for trochlea


noun (pl) -leae (-lɪˌiː)
any bony or cartilaginous part with a grooved surface over which a bone, tendon, etc, may slide or articulate
Word Origin
C17: from Latin, from Greek trokhileia a sheaf of pulleys; related to trokhos wheel, trekhein to run
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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trochlea in Medicine

trochlea troch·le·a (trŏk'lē-ə)
n. pl. troch·le·ae (-lē-ē')

  1. An anatomical structure that resembles a pulley, especially the part of the distal end of the humerus that articulates with the ulna.

  2. A fibrous loop in the eye socket near the nasal process of the frontal bone, through which the tendon of the superior oblique muscle of the eye passes.

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