[woad] n [ME wod, fr. OE wad; akin to OHG weit woad, L vitrum] (bef. 12c): a European herb (Isatis tinctoria) of the mustard family formerly grown for the blue dyestuff yielded by its leaves; also: this dyestuff
WOAD
Meaning of WOAD in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012