Definitions
1.NounOne who, or that which, retracts.
2.NounIn breech-loading firearms, a device for withdrawing a cartridge shell from the barrel.
3.NounA chess puzzle in which a number of moves are retracted and the solver is challenged to reach an alternate outcome.
4.NounA surgical instrument used to hold apart the edges of an incision or wound.
5.NounA bandage to protect soft parts of the body from injury by a surgical saw.
6.NounA muscle serving to draw in any part.