D defs.my
Entry 1 sense Webster, 1913

Myosin

/mī'-əs-ən/ · My·o·sin · IPA /ˈmaɪ.oʊsɪn/
01 n. A protein present in muscle, serving as the principle contractile protein in muscle contraction.
  1. 1.
    A protein present in muscle, serving as the principle contractile protein in muscle contraction.(Physiol. Chem.)