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1. | (Bot.) An herbaceous cruciferous plant (Isatis tinctoria) of the family | |||||||
2. | 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 It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing.
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Noun | 1. | woad - a blue dyestuff obtained from the woad plant |
2. | woad - any of several herbs of the genus Isatis |