Definition of Echinoidea in English:

Echinoidea

proper noun

Zoology
  • A class of echinoderms that comprises the sea urchins.

    • ‘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.’
    • ‘Other representatives from the Echinoidea also display two nonadjacent rRNA genes (with the trnV gene inserted or not inserted).’
    • ‘BNip3-related sequences were found in all major lineages of Bilateria, from Echinoidea and Ascidiacea to mammals.’

Origin

Modern Latin (plural), from echinus.

Pronunciation:

Echinoidea

/ˌekəˈnoidēə/