Definition of Centrechinoida
:a large order of sea urchins having peristomial gills, sphaeridia, and an apically located anus — compare cidaroida , exocycloida
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Centrechinoida
plural noun
Cen·trech·i·noi·da
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(ˌ)sen‧ˌtrekə̇ˈnȯidə
\
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Origin and Etymology of centrechinoida
New Latin, from Centrechinus + -oida
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