1. 硬皮的：crustaceology 甲壳类动物学 | crustaceous 硬皮的 | crustal 地壳的
2. 硬皮的/外壳的：crustaceans /介虫/ | crustaceous /硬皮的/外壳的/ | crustal /地壳的/
3. 外壳的：crustacean 甲壳类的 | crustaceous 外壳的 | crustaceoushardback 硬皮的
4. 皮壳的：carbonaceous 含碳的 | crustaceous 皮壳的 | orchidaceous 似兰花的
adj
1. crustaceous
1. being or having or resembling a hard crust or shell
2. crustaceous
2. of or belonging to the class Crustacea
Synonym: crustacean