echinoderm


Concise Oxford English Dictionary © 2008 Oxford University Press:
echinoderm /ɪˈkʌɪnə(ʊ)dəːm, ˈɛkɪn-/
noun Zoology a marine invertebrate of the phylum Echinodermata, which includes starfishes, sea urchins, brittlestars, crinoids, and sea cucumbers.
– origin from mod. L. Echinodermata, from Gk ekhinos ‘hedgehog, sea urchin’ + derma ‘skin’.
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