[ ak-tuh-mahy-uh-sin ]
/ ˌæk təˈmaɪ ə sɪn /

noun Biochemistry.

a complex protein, consisting of myosin and actin, that is the major constituent of skeletal muscle and is thought to interact with ATP to cause muscle contraction.

Words nearby actomyosin

Origin of actomyosin

First recorded in 1940–45; act(in) + -o- + myosin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for actomyosin

/ (ˌæktəʊˈmaɪəsɪn) /


a complex protein in skeletal muscle that is formed by actin and myosin and which, when stimulated, shortens to cause muscle contraction
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

Medical definitions for actomyosin

[ ăk′tə-mīə-sĭn ]


A protein complex that is the essential contractile substance of muscle, composed of the globulin myosin and actin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.