phototherapy /-ther′əpē/ [Gk, phos + therapeia, treatment] , the treatment of disorders by the use of light, especially ultraviolet light. Ultraviolet light may be used in the therapy of acne, pressure ulcers and other indolent ulcers, psoriasis, and hyperbilirubinemia. Also called lucotherapy. See also photochemotherapy. −phototherapeutic, adj.
