What is the definition of Echinoidea? | Dictionary.net

ECHINOIDEA

\ˈɛt͡ʃɪnˌɔ͡ɪdi͡ə], \ˈɛt‍ʃɪnˌɔ‍ɪdi‍ə], \ˈɛ_tʃ_ɪ_n_ˌɔɪ_d_iə]\

Definitions of ECHINOIDEA

2006 - WordNet 3.0
2011 - English Dictionary Database
2010 - Medical Dictionary Database
1874 - Etymological and pronouncing dictionary of the English language

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sea urchins and sand dollars

2006 - WordNet 3.0
By Princeton University

sea urchins and sand dollars

2011 - English Dictionary Database
By DataStellar Co., Ltd

Somewhat flattened, globular echinoderms of the class Echinoidea, having thin, brittle shells of calcareous plates.

2010 - Medical Dictionary Database
By DataStellar Co., Ltd

A family of the radiata, comprehending the marine creatures known as sea-eggs or sea-urchins.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

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