a muscle that extends or straightens some part of the body, esp. a flexed arm or leg
Origin of extensorLate Latin extensor, stretcher from Classical Latin extensus: see extensible
A muscle that extends or straightens a limb or body part.
Origin of extensorNew Latin extēnsor from Latin extēnsus past participle of extendere to stretch out ; see extend .
- (anatomy) A muscle whose contraction extends or straightens a limb or body part.