UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/rɪˈtræktə/US:USA pronunciation: respellingUSA pronunciation: respelling(ri traktər)

WordReference Random House Unabridged Dictionary of American English © 2020
re•trac•tor  (ri traktər),USA pronunciation n. 
  1. a person or thing that retracts.
  2. Anatomya muscle that retracts an organ or protruded part.
  3. Surgeryan instrument or appliance for drawing back an impeding part, as the edge of an incision.
  4. a mechanism, device, or the like that regulates retraction:to adjust the retractor on a seat belt.
  • retract1 + -or2 1830–40

Collins Concise English Dictionary © HarperCollins Publishers::
retractor /rɪˈtræktə/ n
  1. any of various muscles that retract an organ or part
  2. an instrument for holding back the edges of a surgical incision or organ or part
  3. a person or thing that retracts

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