Echinoderm Definition

ĭ-kīnə-dûrm
echinoderms
noun
Any of a phylum (Echinodermata) of marine animals with a water-vascular system, and usually with a hard, spiny skeleton and radial body, including the starfishes and sea urchins.
Webster's New World

Other Word Forms of Echinoderm

Noun

Singular:
echinoderm
Plural:
echinoderms

Origin of Echinoderm

  • From New Latin Echīnodermata phylum name echino– -dermata -skinned (from Greek derma dermat- skin –derm)

    From American Heritage Dictionary of the English Language, 5th Edition

  • Ancient Greek ἐχῖνος (ekhinos, “hedgehog”) + δέρμα (derma, “skin”)

    From Wiktionary

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echinoderm