euechinoidea


euechinoidea
\(|)yü+\ noun plural
Usage: capitalized
Etymology: New Latin, from eu- + Echinoidea
in some classifications : a division of Echinoidea including all living sea urchins and comprising the orders Cidaroida, Centrechinoida, and Exocycloida — compare palaeechinoidea

Useful english dictionary. 2012.