birth·wort /-ˌwɝt, ˌwɔrt/
  馬兜鈴
  Birth·wort n. A genus of herbs and shrubs (Aristolochia), reputed to have medicinal properties.
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  birthwort
       n : creeping plant having curving flowers thought to resemble
           fetuses; native to Europe; naturalized Great Britain and
           eastern North America [syn: Aristolochia clematitis]