| Main Entry: | |
| 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 |