Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Structure resembling a pulley, typically in reference to the area connecting the upper and lower arm.

from the GNU version of the Collaborative International Dictionary of English

  • n. A pulley.
  • n. A pulley, or a structure resembling a pulley

from The Century Dictionary and Cyclopedia

  • n. In anatomy and zoology, a pulley or pulley-like arrangement of parts, affording a smooth surface upon which another part glides.

Etymologies

Latin, system of pulleys, from Greek trokhileia; akin to trekhein, to run.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Greek trokhileia. (Wiktionary)

Examples

  • Above the front part of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm.

    II. Osteology. 6a. 3. The Humerus

  • Above the back part of the trochlea is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm.

    II. Osteology. 6a. 3. The Humerus

  • It's a backdrop she knows expertly: Mending a fence, one cowhand has to "cast about for a stick or something to twist tight a diagonal cross-brace wire, but the only thing at hand was a cow's bleached leg bone with its useful trochlea head, which seemed made to jam fence wire tight."

    Old West and New Collide Amid Cowpoke McMansions

  • "Medial epicondyle, trochlea, greater and lesser tubercle, " he said.

    City of Bones

  • Congenital displacement results from imperfect development of the external lip of the trochlea.

    Common Diseases of Farm Animals

  • Frenulum: the spine, simple in males, compound in females, arising from the base of secondaries in many Lepidoptera, whose function it is to unite the wings in flight: in Cicada the triangular lateral piece on the mesonotum which connects with the trochlea: the anal area of secondaries and thus = tendo, q.v. Frenulum hook: in the males of frenate Lepidoptera, a hook or fold into which the frenulum is fitted.

    Explanation of Terms Used in Entomology

  • In upward luxation, reduction is effected by attempting further extension of the stifle joint and at the same time the patella is pulled outward, off the internal rim of the trochlea.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1

  • Because of the manner in which the patella functionates with the trochlea of the femur, comparatively little energy is required to prevent further flexion of the stifle joint.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1

  • The section passes through the middle of the groove of the trochlea of the tibial tarsal bone. 1 and 2.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1

  • It usually communicates with the medial sac of the femerotibial joint cavity by a slit-like opening situated at the lowest part of the medial ridge of the trochlea.

    Lameness of the Horse Veterinary Practitioners' Series, No. 1

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