noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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. countable, uncountable
2. 2
   European biennial formerly grown for the blue coloring matter yielded by its leaves wordnet

Synonyms

All synonyms

isatis tinctoria