- [Bot] A thorny tree or shrub of the genus Lawsonia Lawsonia alba). The fragrant white blossoms are used by the Buddhists in religious ceremonies. The powdered leaves furnish a red coloring matter used in the East to stain the nails and fingers, the manes of horses, etc.
- [Com] The leaves of the henna plant, or a preparation or dyestuff made from them.
Etymology: Ar. hinnā alcanna (Lawsonia inermis syn. Lawsonia alba). Cf. Alcanna Alkanet Orchanet