Retractor

Part of speech: noun (n.)

1. One who, or that which, retracts. Specifically:

2. In breech-loading firearms, a device for withdrawing a cartridge shell from the barrel. (b) (Surg.)

3. An instrument for holding apart the edges of a wound during amputation.

4. A muscle serving to draw in any organ or part. See Illust. under Phylactolæmata.