Cardiidae
plural noun
Car·di·i·dae
| \ kärˈdīəˌdē\
Definition of Cardiidae
: a family of marine bivalve mollusks (order Eulamellibranchia) that have an equivalve ribbed shell with prominent umbones, a large foot adapted for creeping over sandy bottoms, and much-folded gills and that include the true cockles
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