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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Genista tinctoria
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
greenweed, dyer's-broom, dyeweed, greenweed, whin,
woadwaxen]