1. the commonest protein in muscle; a globulin that combines with actin to form actomyosin;
The Collaborative International Dictionary of English v.0.48:
Myosin \My"o*sin\, n. [Gr. my^s, myo`s a muscle.] (Physiol.
A protein present in muscle, serving as the principle
contractile protein in muscle contraction.
Note: It was earlier considered as being formed in the
process of coagulation which takes place in rigor
mortis. See Muscle plasma, under Plasma.
[1913 Webster +PJC]
Note: Myosin belongs to the group of globulins. It is
insoluble in water, but soluble in dilute solution of
salt, and is especially characterized by being
completely precipitated by saturation of its solutions
WordNet (r) 3.0 (2006):
n 1: the commonest protein in muscle; a globulin that combines
with actin to form actomyosin