Definitions of madder
  1. noun
    Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin
    synonyms: Rubia tinctorum
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    type of:
    madderwort, rubiaceous plant
    any of numerous trees or shrubs or vines of the family Rubiaceae
  2. verb
    color a moderate to strong red
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    type of:
    make red
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