valerian

Definition of valerian

valerian (vuh-LEER-ee-un): A plant whose roots are used as a sedative and to treat certain medical conditions. It is being studied as a way to improve sleep in cancer patients undergoing treatment. Also called garden heliotrope, garden valerian, Indian valerian, Mexican valerian, Pacific valerian, Valeriana officinalis, and Valerianae radix.

Source: NCI Dictionary of Cancer Terms