| 单词 | heart urchin |
| 释义 | > as lemmasheart urchin heart urchin n. any of numerous burrowing sea urchins of the order Spatangoida, found worldwide and also common as fossils, with bilaterally symmetrical bodies resembling a heart in shape. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Echinoidea > order Spatangoidea > member of genus Spatangus mermaid's head1662 heart urchin1830 sea-bun1882 1830 M. A. Venning Rudim. Mineral. xiv. 159 Heart and cap urchins are not found lower than the green sand. 1923 L. A. Borradaile Animal & its Environment v. 141 The Antarctic heart-urchin Hemiaster philippi bearing its young in the sunken grooves (‘petals’) on its back. 2010 G. Karleskint et al. Introd. Marine Biol. (ed. 3) ii. ix. 251/1 Sand dollars and heart urchins prefer to bury themselves in sandy bottoms. < as lemmas |
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