mad·wort /-ˌwɝt, ˌwɔrt/
  十字花科的一年生草本
  Mad·wort n. Bot. A genus of cruciferous plants (Alyssum) with white or yellow flowers and rounded pods. Alyssum maritimum is the commonly cultivated sweet alyssum, a fragrant white-flowered annual.
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  madwort
       n : any garden plant of the genus Alyssum having clusters of
           small yellow or white flowers [syn: alyssum]