mactra

From the genus name.

mactra (plural mactras)

1. Any marine bivalve shell of the numerous known species of genus Mactra and allied genera, some of which are used as food, for example the European clam Mactra stultorum.

• trough shell
• duck clam
• surf clam

• “mactra”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• amtrac, ram-cat, tarmac

Late Latin gloss of Ancient Greek μάκτρα (máktra, “kneading trough”).

mactra f (genitive mactrae); first declension

1. (Late Latin) A kneading trough

First-declension noun.

• “mactra”, in ΛΟΓΕΙΟΝ [Logeion] (in English, French, Spanish, German, Dutch and Chinese), University of Chicago, 2011