spatangoida

Noun
  1. Heart-shaped sea urchins (synset 102322341)
    is a type of: animal order - the order of animals
    member holonym: heart urchin - sea urchin having a heart-shaped body in a rigid spiny shell
    belongs to: class echinoidea, echinoidea - sea urchins and sand dollars
    same as: order spatangoida

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