n. 食言的人, 牵拉肌, 牵开器

[医] 牵开器, 缩肌

[ noun ]
surgical instrument that holds back the edges of a surgical incision
<noun.artifact>

Retractor \Re*tract"or\ (r[-e]*tr[=a]kt"[~e]r), n.
One who, or that which, retracts. Specifically:
(a) In breech-loading firearms, a device for withdrawing a
cartridge shell from the barrel.
(b) (Surg.) An instrument for holding apart the edges of a
wound during amputation.
(c) (Surg.) A bandage to protect the soft parts from injury
by the saw during amputation.
(d) (Anat. & Zo["o]l.) A muscle serving to draw in any organ
or part. See Illust. under {Phylactol[ae]mata}.