Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun clamshell

2 senses of clamshell

Sense 1
clamshell -- (the shell of a clam)
       => shell -- (the hard largely calcareous covering of a mollusc or a brachiopod)

Sense 2
clamshell, grapple -- (a dredging bucket with hinges like the shell of a clam)
       => dredging bucket -- (a bucket for lifting material from a channel or riverbed)