retractor

名词 retractor:

1. surgical instrument that holds back the edges of a surgical incision

re.trac.tor

n.（名词）
One that retracts, as:
缩回的东西，如：
Anatomy A muscle, such as a flexor, that retracts an organ or a part.
【解剖学】 牵拉肌：能使器官或部位收缩的肌肉，例如屈肌
Medicine A surgical instrument used to hold back organs or the edges of an incision.
【医学】 牵开器：一种手术仪器，用于将器官或切开的边缘撑住