[ ik-sten-ser, -sawr ]

  1. a muscle that serves to extend or straighten a part of the body.

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Origin of extensor

1700–10; <New Latin, equivalent to Latin extend(ere) to extend + -tor-tor, with -dt->-s-

Words Nearby extensor

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use extensor in a sentence

  • The magnetic field cut off and he instantly raced his extensor motors to leap forward.

    The Velvet Glove | Harry Harrison

British Dictionary definitions for extensor


/ (ɪkˈstɛnsə, -sɔː) /

  1. any muscle that stretches or extends an arm, leg, or other bodily part: Compare flexor

Origin of extensor

C18: from New Latin, from Latin extensus stretched out

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

Scientific definitions for extensor


[ ĭk-stĕnsər ]

  1. A muscle that extends or straightens a limb or joint. Compare flexor.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.