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Medical Dictionary

Echinoidea

noun plural Ech·i·noi·dea \ ˌek-ə-ˈnȯi-dē-ə \

medical Definition of Echinoidea

:a class of motile bottom-dwelling echinoderms comprising the sea urchins and related forms

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echinoid

play \ˈek-ə-ˌnȯid\ noun

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