'Phototherapy' definitions:

Definition of 'phototherapy'

(from WordNet)
noun
The use of strong light to treat acne or hyperbilirubinemia of the newborn

Definition of 'Phototherapy'

From: GCIDE
  • Phototherapy \Pho`to*ther"a*py\, n. (Med.) The application of light for therapeutic purposes, esp. for treating diseases of the skin. -- {Pho`to*the*rap"ic}, {Pho`to*ther`a*peu"tic}, a. [Webster 1913 Suppl.]