Woad-wax·en n.  Bot. A leguminous plant (Genista tinctoria) of Europe and Russian Asia, and adventitious in America; -- called also greenwood, greenweed, dyer's greenweed, and whin, wood-wash, wood-wax, and wood-waxen.
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  dyer's greenweed
       n : small Eurasian shrub having clusters of yellow flowers that
           yield a dye; common as weed in England and United States;
           sometimes grown as an ornamental [syn: woodwaxen, dyer's-broom,
            dyeweed, greenweed, whin, woadwaxen, Genista
           tinctoria]