Definition of retractors:
(n) :
A surgical instrument used to hold apart the edges of an incision or wound.
(n) :
One who, or that which, retracts.
(n) :
In breech-loading firearms, a device for withdrawing a cartridge shell from the barrel.
(n) :
(chess) A chess puzzle in which a number of moves are retracted and the solver is challenged to reach an alternate outcome.
(n) :
A bandage to protect soft parts of the body from injury by a surgical saw.
(n) :
(zoology) A muscle serving to draw in any part.