dyer's woad
English
Noun
dyer's woad (countable and uncountable, plural dyer's woads)
- A plant of species Isatis tinctoria, which is the source of the blue dye woad used in the Middle Ages, before being replaced as source by Indigofera tinctoria.
Synonyms
- (Isatis tinctoria): woad, glastrum, Asp of Jerusalem
See also
References
dyer's woad on Wikipedia.Wikipedia 
Isatis tinctoria on Wikispecies.Wikispecies 
Isatis tinctoria on Wikimedia Commons.Wikimedia Commons
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