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sand dollar
noun
- any of various flat, disklike sea urchins, as Mellita testudinata or Echinarachnius parma, that live on sandy bottoms off the coasts of the U.S.
sand dollar
noun
- any of various flattened disclike echinoderms of the order Clypeasteroida, of shallow North American coastal waters: class Echinoidea (sea urchins)
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Word History and Origins
Origin of sand dollar1
An Americanism dating back to 1880–85
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