| Main Entry: | crustacean |
| Part of Speech: | noun |
| Definition: | arthropod |
Synonyms: |
shellfish |
| Notes: | one major difference between insect, spider, and crustacean is the antennae; one pair on most insects, none on spiders, and two pairs for crustaceans |
| Main Entry: | barnacle |
| Part of Speech: | noun |
| Definition: | parasite |
Synonyms: |
appendage, bloodsucker, crustacean, freeloader, hanger-on, leech |
| Main Entry: | shellfish |
| Part of Speech: | noun |
| Definition: | invertebrate |
Synonyms: |
barnacle, clam, conch, crawfish, crayfish, crustacean, lobster, mollusk, mussel, oyster, piddock, prawn, scallop, shrimp, snail, whelk |