CRUSTACEOUS
crustaceous
(adjective) being or having or resembling a hard crust or shell
crustaceous, crustacean
(adjective) of or belonging to the class Crustacea
Source: WordNet® 3.1
Adjective
crustaceous (comparative more crustaceous, superlative most crustaceous)
Resembling a crustacean.
Hard, thin and brittle.
Source: Wiktionary
Crus*ta"ceous (krs-t"shs; 97), a. Etym: [NL. crustaceous. See
crustacea.]
1. Pertaining to, or of the nature of, crust or shell; having a
crustlike shell.
2. (Zoöl.)
Definition: Belonging to the Crustacea; crustacean.
Source: Webster’s Unabridged Dictionary 1913 Edition