extensor

noun

ex·​ten·​sor ik-ˈsten(t)-sər How to pronounce extensor (audio)
: a muscle serving to extend a bodily part (such as a limb)

Examples of extensor in a Sentence

Recent Examples on the Web Wiseman concluded that Lucy's knee extensor muscles would allow for sufficient leverage to straighten the knee joints like modern humans, thereby enabling Lucy to walk upright, as well as performing a range of other motions similar to chimpanzees and bonobos. Jennifer Ouellette, Ars Technica, 13 June 2023 The straight leg raise test can reveal disruption of the extensor mechanism, which includes the quadriceps tendon, patella, and patellar tendon. Jonathan Cluett, Md, Verywell Health, 9 Nov. 2023 The strength of our knee extensors also contributes to the stability of the joint, which is vital for plyometric training and lateral agility. Cori Ritchey, Men's Health, 16 Aug. 2023 Prone Isometric Back Extension This movement will train your abdominals and extensor muscles to stabilize the spine and prevent it from flexing forward, Warner says. Cori Ritchey, Men's Health, 1 Aug. 2023 Key evidence lay in the knee extensor muscles, which seemed to have the leverage required to straighten the knee. Matt Hrodey, Discover Magazine, 19 June 2023 The triceps brachii is a main extensor of the elbow. David Otey, Men's Health, 10 Feb. 2023 One's lower back muscles are comprised of extensor muscles, flexor muscles and oblique muscles, and include the muscle mass known as the erector spinae − the muscle group that helps hold up one's spine and glute muscles. Daryl Austin, USA TODAY, 13 May 2023 Sometimes, a neighboring tendon (the extensor hallucis longus) is used to strengthen the repair. Verywell Health, 22 Feb. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'extensor.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1615, in the meaning defined above

Time Traveler
The first known use of extensor was in 1615

Dictionary Entries Near extensor

Cite this Entry

“Extensor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extensor. Accessed 23 Feb. 2024.

Kids Definition

extensor

noun
ex·​ten·​sor ik-ˈsten(t)-sər How to pronounce extensor (audio)
: a muscle serving to extend a bodily part (as a leg or arm)

Medical Definition

extensor

noun
ex·​ten·​sor ik-ˈsten(t)-sər How to pronounce extensor (audio) -sȯ(ə)r How to pronounce extensor (audio)
: a muscle serving to extend a bodily part (as a limb)

called also extensor muscle

compare flexor
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!