Any of various plants with green foliage, particularly plants used to produce dyes or pigments.
Compound of 'green' and 'weed.' The term historically referred to plants like dyer's greenweed or weld used to produce yellow-green dyes. 'Weed' here means plant or herb, not an invasive plant.
Before synthetic dyes, plants like greenweed and woad were so valuable they drove entire economies—one plant could determine which country became wealthy through the textile trade!
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