| Word | Definitions | Synonyms |
|---|---|---|
| brachiopod | (adjective) of or belonging to the phylum Brachiopoda | Synonyms: brachiopodous |
| branchiopod | (adjective) of or relating to or characteristic of the subclass Branchiopoda | Synonyms: branchiopodan, branchiopodous |
| cephalopod | (adjective) relating or belonging to the class Cephalopoda | Synonyms: cephalopodan |
| pelecypod | (adjective) bivalve | Synonyms: lamellibranch, pelecypodous |