triceps Meaning, Definition & Usage

  1. noun any skeletal muscle having three origins (but especially the triceps brachii)

WordNet

Tri"ceps noun
Etymology
NL., fr. L. triceps, having three beads; tres, tria, three + caput head: cf. F. triceps. See Three, and Chief.
Definitions
  1. (Anat.) A muscle having three heads; specif., the great extensor of the forearm, arising by three heads and inserted into the olecranon at the elbow.

Webster 1913