Crossword clue: an order of lamellibranchs having but one muscle for closing the shell, as the oyster.

The most common answer is monomya (7 letters).

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

monomya 7 letters web-def

An order of lamellibranchs having but one muscle for closing the shell, as the oyster.

monomyaria 10 letters web-def

An order of lamellibranchs having but one muscle for closing the shell, as the oyster.