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ECHINODERM
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I. (noun)
Sense 1
Meaning:
Marine invertebrates with tube feet and five-part radially symmetrical bodies
Classified under:
Hypernyms ("echinoderm" is a kind of...):
invertebrate (any animal lacking a backbone or notochord; the term is not used as a scientific classification)
Meronyms (parts of "echinoderm"):
water vascular system (system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration)
ambulacrum (one of the five areas on the undersurface of an echinoderm on which the tube feet are located)
tube foot (tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians) having a sucker at the end and used for e.g. locomotion and respiration)
Hyponyms (each of the following is a kind of "echinoderm"):
sea star; starfish (echinoderms characterized by five arms extending from a central disk)
brittle-star; brittle star; serpent star (an animal resembling a starfish with fragile whiplike arms radiating from a small central disc)
basket fish; basket star (any starfish-like animal of the genera Euryale or Astrophyton or Gorgonocephalus having slender complexly branched interlacing arms radiating from a central disc)
sea urchin (shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells)
crinoid (primitive echinoderms having five or more feathery arms radiating from a central disk)
holothurian; sea cucumber (echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders)
Holonyms ("echinoderm" is a member of...):
Echinodermata; phylum Echinodermata (radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers)
