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Echinoidea Syllabification: Ech·i·noi·de·a
Pronunciation: /ˌekəˈnoidēə/

Definition of Echinoidea in English:

A class of echinoderms that comprises the sea urchins.
Example sentences
  • Ophiuroidea is grouped with Echinoidea and Holothuroidea based on the closed ambicular grooves.
  • Clark endorsed splitting L. sexiesperforata from Mellita but Mortensen used the name Leodia as a subgenus of Mellita in his extremely influential Monograph of the Echinoidea.
  • BNip3-related sequences were found in all major lineages of Bilateria, from Echinoidea and Ascidiacea to mammals.


Modern Latin (plural), from echinus.

Definition of Echinoidea in:

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