• synonyms


[roh-tey-ter or, esp. British, roh-tey-]
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noun, plural ro·ta·tors for 1, 3, ro·ta·tor·es [roh-tuh-tawr-eez, -tohr-] /ˌroʊ təˈtɔr iz, -ˈtoʊr-/ for 2.
  1. a person or thing that rotates.
  2. Anatomy. a muscle serving to rotate a part of the body.
  3. Nautical. a bladed device streamed to rotate in the water to actuate a patent log.
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Origin of rotator

1670–80; < Latin rotātor, equivalent to rotā(re) (see rotate1) + -tor -tor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for rotator

wheel, rotator

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British Dictionary definitions for rotator


  1. a person, device, or part that rotates or causes rotation
  2. anatomy any of various muscles that revolve a part on its axis
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

rotator in Medicine


  1. A muscle that serves to rotate a part of the body.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.