a sea urchin, esp. a heart urchin.
| 单词 | θ33474 |
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Echinoidea > order Spatangoidea > member of genus Spatangus (3) mermaid's head1662 a sea urchin, esp. a heart urchin. heart urchin1830 any of numerous burrowing sea urchins of the order Spatangoida, found worldwide and also common as fossils, with bilaterally symmetrical bodies… sea-bun1882 the heart-urchin. |
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