411 REFERENCE · Wiktionary
Perischoechinoidea
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Translingual
Etymology
mul
Proper noun
subclass class Echinoidea primitive sea urchins
Hypernyms
superorder ; Cidaroidea subclass - subclass
Hyponyms
superorder Cidaroida order - sole extant order
References
Echinoidea