henna

henna, name for a reddish or black hair dye obtained from the powdered leaves and young shoots of the mignonette tree, or henna shrub (Lawsonia inermis), an Old World shrub of the loosestrife family. Henna dye has long been in use, as evidenced by Egyptian mummies; the dye is also to decorate the skin with designs.

See more Encyclopedia articles on: Organic Chemistry