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

  • n. A large three-headed muscle running along the back of the upper arm and serving to extend the forearm.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any muscle having three heads.
  • n. Specifically, the triceps brachii.

from the GNU version of the Collaborative International Dictionary of English

  • n. A muscle having three heads; specif., the great extensor of the forearm, arising by three heads and inserted into the olecranon at the elbow.

from The Century Dictionary and Cyclopedia

  • Three-headed; tricipital; specifically, in anatomy, noting certain muscles which arise by three heads.
  • n. A tricipital or three-headed muscle, which has a triple origin and proceeds to a single insertion; especially, such a muscle of the fore or hind limb, expressly named as in the following phrases.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any skeletal muscle having three origins (but especially the triceps brachii)


From Latin, three-headed : tri-, tri- + caput, head.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin trīceps ("triple-headed"), from trēs ("three") + caput ("head"). (Wiktionary)



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