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单词 spatangina
释义 spat·an·gi·na
\ˌspatənˈjīnə, -jēnə\ noun plural
Usage: capitalized
Etymology: New Latin, from Spatangus + -ina
: 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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