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actinin

American

[ak-tuh-nin] / ˈæk tə nɪn /

noun

Biochemistry.

a contractile protein of muscle.

Etymology

Origin of actinin

First recorded in 1970–75; actin + -in ²

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.