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单词 echinoderm
释义

WordReference Random House Unabridged Dictionary of American English © 2024
e•chi•no•derm  (i kīnə dûrm′, ekə nə-),USA pronunciation n. 
  1. Invertebratesany marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea urchins, sea cucumbers, etc.
  • Greek echîn(os) sea urchin + -o- -o- + -dermatos -dermatous
  • taken as singular of Neo-Latin Echinodermata, neuter plural of echinodermatus 1825–35

Collins Concise English Dictionary © HarperCollins Publishers::
echinoderm /ɪˈkaɪnəʊˌdɜːm/ n
  1. any of the marine invertebrate animals constituting the phylum Echinodermata, characterized by tube feet, a calcite body-covering (test), and a five-part symmetrical body. The group includes the starfish, sea urchins, and sea cucumbers
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