Retractor

1. n. A muscle serving to draw in any organ or part. See Illust. under Phylactolaemata.
2. n. One who, or that which, retracts.
3. n. In breech-loading firearms, a device for withdrawing a cartridge shell from the barrel.
4. n. An instrument for holding apart the edges of a wound during amputation.
5. n. A bandage to protect the soft parts from injury by the saw during amputation.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.