The Collaborative International Dictionary
Madder \Mad"der\ (m[a^]d"d[~e]r), n. [OE. mader, AS. m[ae]dere; akin to Icel. ma[eth]ra.] (Bot.) A plant of the genus Rubia ( Rubia tinctorum). The root is much used in dyeing red, and formerly was used in medicine. It is cultivated in France and Holland. See Rubiaceous.
Note: Madder is sometimes used in forming pigments, as lakes, etc., which receive their names from their colors, such as madder yellow.
Field madder, an annual European weed ( Sherardia arvensis) resembling madder.
Indian madder, the East Indian Rubia cordifolia, used in the East for dyeing; -- called also munjeet.
Wild madder, Rubia peregrina of Europe; also the Galium Mollugo, a kind of bedstraw.
Wikipedia
Rubia cordifolia, often known as common madder or Indian madder, is a species of flowering plant in the coffee family, Rubiaceae. It has been cultivated for a red pigment derived from roots.
Common names of this plant include manjistha in Sanskrit, Marathi, Kannada and Bengali, majith in Hindi and Gujarati, བཙོད་ in Tibetan, tamaralli in Telugu, manditti in Tamil.