Added 10 October 2026 crustaceous /kɹʌsˈteɪʃəs/ adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about crustaceous at Wordnik → Where our words come from → Of or belonging to the class Crustacea. Being or having or resembling a hard crust or shell. Related Words: testalichenscrustlikesquidlikeshrimplikeostraceousclamlikeclawlikechitinoidlobsterlikecrumblikeprawnlike Back to today's word