Hypertext Webster Gateway: "Rubia"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Madder \Mad"der\, n. [OE. mader, AS. m[ae]dere; akin to Icel.
ma?ra.] (Bot.)
A plant of the {Rubia} ({R. 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; 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.
From WordNet (r) 1.7 (wn)
Rubia
n : type genus of the Rubiaceae; Old World herbs and subshrubs
grown for their medicinal properties and for dye
substances extracted from their roots [syn: {Rubia}, {genus
Rubia}]
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