retractor

1. One who, or that which, retracts.

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

3. A chess puzzle in which a number of moves are retracted and the solver is challenged to reach an alternate outcome.

4. A surgical instrument used to hold apart the edges of an incision or wound.

   surgical instrument that holds back the edges of a surgical incision

5. A bandage to protect soft parts of the body from injury by a surgical saw.

6. A muscle serving to draw in any part.

regular