A protein found in muscle that together with myosin functions in muscle contraction.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "actin" in a sentence
"Use of the term 'actin' like' doesn't mitigate the harm this crime has on survivors of sexual violence."
"They attached a fibre of the muscle protein actin to the gamma subunit, and the beta units were attached to the substratum."
"Instead of someone who is a President I won't mention his name actin all kissy face with the enemy."