Echinoidea


Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to Echinoidea: sand dollar
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Echinoidea - sea urchins and sand dollarsEchinoidea - sea urchins and sand dollars  
Echinodermata, phylum Echinodermata - radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
Exocycloida, order Exocycloida - flat sea urchins
order Spatangoida, Spatangoida - heart-shaped sea urchins
class - (biology) a taxonomic group containing one or more orders
References in periodicals archive ?