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Spatangina

plural noun Spat·an·gi·na \ ˌspatᵊnˈjīnə , -jēnə \
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Definition of Spatangina

: a suborder of sea urchins (order Exocyloida) comprising numerous more or less flattened approximately heart-shaped sea urchins that exhibit considerable secondary bilateral symmetry — compare clypeastrina

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Origin and Etymology of spatangina

New Latin, from Spatangus + -ina

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