Centrechinoida
plural noun
Cen·trech·i·noi·da
| \ (ˌ)sen‧ˌtrekə̇ˈnȯidə\
Definition of Centrechinoida
: a large order of sea urchins having peristomial gills, sphaeridia, and an apically located anus — compare cidaroida , exocycloida
Keep scrolling for more