my·​o·​sin | \ ˈmī-ə-sən How to pronounce myosin (audio) \

Definition of myosin

: a fibrous globulin of muscle that can split ATP and that reacts with actin in muscle contraction to form actomyosin

Examples of myosin in a Sentence

Recent Examples on the Web Matsuno agrees that myosins are likely causing cell handedness. Tim Vernimmen, Quanta Magazine, "How Life Turns Asymmetric," 31 Jan. 2017 Nearly all multicellular animals, except for simple ones like sponges, depend on muscles to move, and all their muscles use some form of contracting fibers in which filaments of the proteins actin and myosin pull past one another to generate force. Quanta Magazine, "Too Small for Big Muscles, Tiny Animals Use Springs," 13 June 2018 Hundreds or thousands of amino acids are linked together to form proteins such as insulin, collagen, dystrophin, myosin, and the thousands of others needed for life. Sharon Begley, STAT, "Genome ‘writers’ set their first goal: recoding human cells to resist viruses," 1 May 2018 That means making sure the cells have myosin and actin — two proteins that are key to forming the cellular cytoskeleton, and to building muscle filaments. Noah Shachtman, WIRED, "Pentagon Plan to Regrow Limbs: Phase One, Complete," 25 Mar. 2009

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'myosin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of myosin

1942, in the meaning defined above

History and Etymology for myosin

International Scientific Vocabulary my- + -ose entry 2 + -in entry 1

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Time Traveler for myosin

Time Traveler

The first known use of myosin was in 1942

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Statistics for myosin

Cite this Entry

“Myosin.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2020.

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More Definitions for myosin


my·​o·​sin | \ ˈmī-ə-sən How to pronounce myosin (audio) \

Medical Definition of myosin

2 : a fibrous globulin of muscle that can split ATP and that reacts with actin to form actomyosin

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More from Merriam-Webster on myosin

Nglish: Translation of myosin for Spanish Speakers

Britannica English: Translation of myosin for Arabic Speakers Encyclopedia article about myosin

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