Madder (noun)

1. A plant of the genus Rubia, with small flowers and red roots that were used to make a red dye.
2. A plant that is used to make a red dye, typically the plant of the genus Rubia.

Origin:

From the old english word "mædere".

Examples:

1. The madder plant was used to make a red dye.
2. The madder root was used as a source of red dye.
3. The madder dye was used to dye clothes and fabrics.
4. The madder plant was cultivated for its red dye.
5. The madder dye was used to color paintings and frescoes.