noun.
The most common protein in muscle cells, responsible for the elastic and contractile properties of muscle. It combines with actin to form actomyosin.
The Century Dictionary and Cyclopedia
noun.
A globulin, the chief ingredient which separates from muscle-plasma on coagulation.
the GNU version of the Collaborative International Dictionary of English
noun.
A protein present in muscle, serving as the principle contractile protein in muscle contraction.