sea urchinWiktionary 原文英美/ˈsi ˌɝtʃɪ̈n/构词拆解sea词干+urchin词干‘hedgehog’词源说明From sea + urchin (“hedgehog”), reflecting a similarity in appearance to a hedgehog.释义名词noun1Any of many marine echinoderms, of the class Echinoidea, commonly found in shallow water, having a complex chewing structure named Aristotle's lantern.同族词派生词 1sea-urchin cactus