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woad n. 大青;菘藍;藍色染料 大青;菘藍;藍色染料 woad n 1: a blue dyestuff obtained from the woad plant 2: any of several herbs of the genus Isatis Woad \Woad\, n. [OE. wod, AS. w[=a]d; akin to D. weede, G. waid,
OHG. weit, Dan. vaid, veid, Sw. veide, L. vitrum.] [Written also {wad}, and {wade}.] [1913 Webster] 1. (Bot.) An herbaceous cruciferous plant ({Isatis tinctoria}) of the family {Cruciferae} (syn. {Brassicaceae}). It was formerly cultivated for the blue coloring matter derived from its leaves. See {isatin}. [1913 Webster] 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 It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing. [1913 Webster] Their bodies . . . painted with woad in sundry figures. --Milton. [1913 Webster] {Wild woad} (Bot.), the weld ({Reseda luteola}). See {Weld}. {Woad mill}, a mill grinding and preparing woad. [1913 Webster] |
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