ミオシンMeanings1nounmyosinA motor protein involved in muscle contraction and other cellular motility processes. Used in biology and biochemistry contexts.ミオシンはアクチンとともに筋きん肉にくの収しゅう縮しゅくに関かん与よするタンパク質しつです。Myosin is a protein that, together with actin, is involved in muscle contraction.