echinoderm

英 [ɪ'kaɪnə(ʊ)dɜːm; 'ekɪn-] 美 [ɛ'kaɪnə,dɝm]

echinoderm (n.): 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.