adjective
1. of or belonging to the class Crustacea
• Syn: ↑crustacean
• Pertains to noun: ↑Crustacea (for: ↑crustacean), ↑Crustacea
• Derivationally related forms: ↑Crustacea
2. being or having or resembling a hard crust or shell
• Pertains to noun: ↑crust
Useful english dictionary. 2012.