spatangoida
English Thesaurus
1. heart-shaped sea urchins (noun.animal)
| hypernym | : | animal order, |
| definition | : | the order of animals (noun.animal) |
| member holonym | : | heart urchin, |
| definition | : | sea urchin having a heart-shaped body in a rigid spiny shell (noun.animal) |
| member meronym | : | class echinoidea, echinoidea, |
| definition | : | sea urchins and sand dollars (noun.animal) |
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