a flattened, irregular sea urchin belonging to the order Clypeastroida.
| 单词 | θ33467 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Echinoidea > order Clypeastroidea > member of (6) sand dollar1884 a flattened, irregular sea urchin belonging to the order Clypeastroida. sea-biscuit1949 = sand dollar n. at sand, n.2 compounds 2b. pansy1954 South African. In full pansy shell. A sand dollar, Echinodiscus bisperforatus, with a flower-like purple marking on the shell. Subcategories:— genus or member of genus Clypeaster (2) — member of genus Mellita (1) |
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