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
late Middle English: from late Latin decoctio(n-), from decoquere 'boil down' (see decoct)