Woad (noun)

A European plant, Isatis tinctoria, having blue-flowered spikes and yielding a blue dye.

Origin:

The word "woad" comes from the old english word "wād" which is a plant of the genus isatis.

Examples:

1. The ancient Britons used woad to create blue tattoos on their bodies.
2. The blue dye from the woad plant was used to dye the robes of medieval monks.
3. The woad plant has been used for thousands of years to create a blue dye for textiles.
4. Woad was an important source of blue dye in Europe before the arrival of indigo.
5. The woad plant is a hardy perennial which is easy to grow and maintain.