actomyosin

noun

ac·​to·​my·​o·​sin ˌak-tə-ˈmī-ə-sən How to pronounce actomyosin (audio)
: a contractile complex of actin and myosin that together with ATP is active during muscular contraction

Word History

Etymology

act(in) + -o- + myosin

First Known Use

1942, in the meaning defined above

Time Traveler
The first known use of actomyosin was in 1942

Dictionary Entries Near actomyosin

Cite this Entry

“Actomyosin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/actomyosin. Accessed 4 Feb. 2023.

Medical Definition

actomyosin

noun
ac·​to·​my·​o·​sin ˌak-tə-ˈmī-ə-sən How to pronounce actomyosin (audio)
: a viscous contractile complex of actin and myosin concerned together with ATP in muscular contraction

More from Merriam-Webster on actomyosin

Love words? Need even more definitions?

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


Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY