mytiloid
/ˈmɪtɪlɔɪd/ /mɪt(ə)lɔɪd/Zoology
adjective
Originally: resembling a mussel, especially in shape. Later: specifically of or belonging to the order Mytiloida of marine bivalves, which includes marine mussels.
noun
A mussel; (now) especially one of the marine order Mytiloida.
Origin
Mid 19th century. From classical Latin mȳtilus Mytilus + -oid, perhaps after French mityloïde.