decoction

decoction
noun
  1. the liquor resulting from concentrating the essence of a substance by heating or boiling, especially a medicinal preparation made from a plant
    浓缩液,煎剂,浓汁(尤指从植物中提取的药液)
    a decoction of a root.
    根煎剂。
    ■[mass noun]the action or process of extracting the essence of something
    熬;煎
语源
  1. late Middle English: from late Latin decoctio(n-), from decoquere 'boil down' (see decoct)
英语宝典
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