prostomium

英 [prəʊ'stəʊmɪəm] 美 [pro'stomiəm]
  • n. [无脊椎] 口前叶
prostomium
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英文词源

prostomium (n.)
1870, Latinized form of Greek prostomion "fore-mouth, something before the mouth," from pro "before" (see pro-) + stoma "mouth" (see stoma).