echinoderm (n.)youdaoicibaDictYouDict[echinoderm 词源字典]
1834, from Modern Latin Echinodermata, name of the phylum that includes starfish and sea urchins, from Latinized form of Greek ekhinos "sea urchin," originally "porcupine, hedgehog" (see echidna) + derma (genitive dermatos) "skin" (see derma); so called from its spiky shell. Related: Echinodermal.[echinoderm etymology, echinoderm origin, 英语词源]