woad

/woʊd/
noun
  1. A plant (Isatis tinctoria) whose leaves are used to make a blue dye.
    • The farmer grew woad in his field for the natural dye industry.
    • Ancient Britons used woad to dye their bodies blue before battle.
    • Woad produces a rich blue color that was highly valued in medieval Europe.
  2. The blue dye obtained from the leaves of the woad plant.
    • The fabric was soaked in woad until it turned a beautiful sky blue.
    • Before indigo became common, woad was the main source of blue dye.
    • The artist used woad to create a deep blue pigment for her painting.
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