- a muscle that serves to extend or straighten a part of the body.
Origin of extensor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for extensor
They can be extended only by activity of the extensor muscles.
Extensor: that which extends or straightens out; applied to muscles.Explanation of Terms Used in Entomology
John. B. Smith
The extensor tendons and the tendo Achillis are tense and prominent.Surgery, with Special Reference to Podiatry
Diminution of the knee-jerks was noticed, with what seemed to be an extensor response.Tics and Their Treatment
Velpeau advised division of the extensor muscles of the tongue.Psychotherapy
James J. Walsh
- any muscle that stretches or extends an arm, leg, or other bodily partCompare flexor
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
Word Origin and History for extensor
1713, short for medical Latin musculus extensor, from Late Latin extensor "stretcher," agent noun from Latin extensus (see extend).
Online Etymology Dictionary, © 2010 Douglas Harper
- A muscle that extends or straightens a limb or body part.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.