Last Updated
：2025/11/29
Quizzes for review
Any sea urchin of the genus Rotula having a round, flat shell; a type of sand dollar.
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wheel urchin
During a walk along the beach, I found a well-preserved wheel urchin nestled in the sand.
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During a walk along the beach, I found a well-preserved wheel urchin nestled in the sand.
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English - English
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