(n.pl.) One of the classes of the arthropods, including lobsters and crabs; -- so called from the crustlike shell with which they are covered.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). crustacea. Retrieved September 22, 2026, from http://smartdefine.org/crustacea/definitions/1993388 |
| Chicago | Webster's. 2011. "crustacea" http://smartdefine.org/crustacea/definitions/1993388 (accessed September 22, 2026). |
| Harvard | Webster's 2011, crustacea, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/crustacea/definitions/1993388>. |
| MLA | Webster's. "crustacea" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/crustacea/definitions/1993388> |