Definition of woad noun from the Oxford Advanced Learner's Dictionary

 

woad

 noun
noun
BrE BrE//wəʊd//
 
; NAmE NAmE//woʊd//
 
[uncountable]
 
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a blue substance that people used to paint their bodies and faces with in ancient times Word Origin Old English wād, of Germanic origin; related to Dutch wede and German Waid.
See the Oxford Advanced American Dictionary entry: woad