NOUN | animal | order Exocycloida, Exocycloida | flat sea urchins |
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Meaning | Flat sea urchins. | |
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Synonym | Exocycloida | |
Member of | Echinoidea, class Echinoidea | sea urchins and sand dollars |
Members | sand dollar | flattened disklike sea urchins that live on sandy bottoms |
Broader | animal order | The order of animals |
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