from the GNU version of the Collaborative International Dictionary of English.
- (Zoöl.) A marine bivalve shell belonging to the genus Arca and its allies.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology Any of the family Arcidae of
saltwater clamsor marine bivalve molluscs.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun marine bivalve mollusk having a heavy toothed shell with a deep boat-like inner surface
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