pelecypod

noun

1. any mollusk of the class Pelecypoda (Lamellibranchiata), characterized by a bivalve shell enclosing the headless body and lamellate gills, comprising the oysters, clams, mussels, and scallops.

adjective

2. Also pel·e·cyp·o·dous [pel-uh–sip–uh-duh s] /ˌpɛl əˈsɪp ə dəs/. belonging or pertaining to the Pelecypoda.

noun, adjective

1. another word for bivalve (def. 1), bivalve (def. 2)