The Collaborative International Dictionary
Mytiloid
Mytiloid \Myt"i*loid\, a. [Mytilus + -oid.] (Zo["o]l.) Like, or pertaining to, the genus Mytilus, or family Mytilid[ae].
Wiktionary
mytiloid
a. (context zoology English) Resembling or relating to the genus ''Mytilus'' or family Mytilidae.