actin: Meaning and Definition of
ac•tin
Pronunciation: (ak'tun), [key] — n. Biochem.
- a globulin that is present in muscle plasma and that in connection with myosin plays an important role in muscle contraction.
actin-
- var. ofbefore a vowel: actinism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.