triceps brachii

English Thesaurus

1. the skeletal muscle having three origins that extends the forearm when it contracts (noun.body)

hypernym	:	triceps,
definition	:	any skeletal muscle having three origins (but especially the triceps brachii) (noun.body)

part meronym	:	arm,
definition	:	a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb (noun.body)