extensor

名词 extensor:

1. a skeletal muscle whose contraction extends or stretches a body part
   同义词：extensor muscle

ex.ten.sor

n.（名词）
A muscle that extends or straightens a limb or body part.
伸肌：肢体或躯体部分的伸张或伸直的肌肉

来源：
New Latin
现代拉丁语
from Latin extônsus [past participle of] extendere [to stretch out] * see extend
源自 拉丁语 extônsus [] extendere的过去分词 [伸出] *参见 extend