411 REFERENCE · Wiktionary
Atelostomata
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Translingual
right|thumb|Spatangus purpureus species
Etymology
From mul grc ἀτελής imperfect, incomplete + grc στόμα mouth.
Proper noun
superorder class Echinoidea echinoderms having a rigid, exocyclic shell and no jaw
Hypernyms
superorder ; Euechinoidea subclass - subclass
Hyponyms
superorder Cassiduloida order, Spatangoida order (heart urchins) orders
References
(supplement)