Noun alyssum has 2 senses
  1. alyssum, madwort - any garden plant of the genus Alyssum having clusters of small yellow or white flowers
    --1 is a kind of crucifer, cruciferous plant
    --1 is a member of Alyssum, genus Alyssum
  2. Alyssum, genus Alyssum - a genus of the family Cruciferae
    --2 is a kind of dilleniid dicot genus
    --2 is a member of
     Cruciferae, family Cruciferae, Brassicaceae, family Brassicaceae, mustard family
    --2 has members: alyssum, madwort
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