heart urchin
English Thesaurus
1. sea urchin having a heart-shaped body in a rigid spiny shell (noun.animal)
| hypernym | : | sea urchin, |
| definition | : | shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells (noun.animal) |
| member meronym | : | order spatangoida, spatangoida, |
| definition | : | heart-shaped sea urchins (noun.animal) |
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