Definify.com
Webster 1913 Edition
Mactra
‖
Mac′tra
,Noun.
[NL., fr. Gr. [GREEK] kneading trough, fr. [GREEK] to knead.]
(Zool.)
Any marine bivalve shell of the genus
Mactra
, and allied genera. Many species are known. Some of them are used as food, as Mactra stultorum
, of Europe. See Surf clam
, under Surf
.