1. echinoderm

noun. marine invertebrates with tube feet and five-part radially symmetrical bodies.


  • phylum Echinodermata
  • basket fish
  • ambulacrum
  • serpent star
  • crinoid
  • brittle star
  • basket star
  • water vascular system
  • tube foot
  • sea cucumber
  • brittle-star
  • holothurian
  • sea urchin
  • Echinodermata
  • sea star
  • starfish

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Sentences with echinoderm

1. Noun, singular or mass
The echinoderm is in the same family as sea urchins and sand dollars, which use sea water to pump food through their bodies.

2. Adjective
Purple starfish can reproduce asexually, as well, when a portion of the echinoderm fragments from the main part of the body and grows into a separate organism.