The Collaborative International Dictionary
Monomyaria
Monomya \Mo*no"my*a\, Monomyaria \Mon`o*my*a"ri*a\, n. pl. [NL., fr. Gr. mo`nos single + ?, ?, muscle.] (Zo["o]l.) An order of lamellibranchs having but one muscle for closing the shell, as the oyster.