woad
Speech parts
1. woad - Noun
2. woad - Verb
Meaning
An herbaceous cruciferous plant (Isatis tinctoria). It was formerly cultivated for the blue coloring matter derived from its leaves.
A blue dyestuff, or coloring matter, consisting of the powdered and fermented leaves of the Isatis tinctoria. It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing.
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Agriculture, industry and services Former factory building, now reused for services Anger 1, a big department store in centre Farming has a great tradition in Erfurt: the cultivation of woad made the city rich during the Middle Ages.
Eva Heller, Psychologie de la couleur - effets et symboliques (pg. 28) The efforts to block indigo were in vain; the quality of indigo blue was too high and the price too low for pastel made from woad to compete.
Robin J. H. Clark, Christopher J. Cooksey, Marcus A. M. Daniels, Robert Withnall: "Indigo, woad, and Tyrian Purple: important vat dyes from antiquity to the present", Endeavour 17/4 (1993), 191–199.
Blue dyes for clothing were made from woad in Europe and indigo in Asia and Africa.
In Europe woad containing the same dye was used for blue-dying.
Napoleon was forced to dye uniforms with woad, which had an inferior blue colour.