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1. Any of several plants of the genus Rubia, especially R. tinctorum of Eurasia, having small yellow flowers, whorled leaves, and a reddish-brown root.
a. The root of R. tinctorum, formerly an important source of the dye alizarin.
b. A red dye obtained from these roots.
3. A medium to strong red or reddish orange.
[Middle English, from Old English mædere.]
1. (Plants) any of several rubiaceous plants of the genus Rubia, esp the Eurasian R. tinctoria, which has small yellow flowers and a red fleshy root
2. (Plants) the root of this plant
3. (Dyeing) a dark reddish-purple dye formerly obtained by fermentation of this root; identical to the synthetic dye, alizarin
4. (Dyeing) a red lake obtained from alizarin and an inorganic base; used as a pigment in inks and paints
[Old English mædere; related to Middle Dutch mēde, Old Norse mathra]
the comparative of mad
1. any plant of the genus Rubia, esp. the climbing R. tinctorum, of Europe, having open clusters of small yellowish flowers.
2. the root of this plant, formerly used in dyeing.
3. a reddish dye derived from madder.
[before 1000; Middle English mad(d)er, Old English mæd(e)re]
comparative of mad.
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|Noun||1.||madder - Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin|
|Verb||1.||madder - color a moderate to strong red |
redden - make red; "The setting sun reddened the sky"