n., pl., -pies.
The treatment of a disorder, especially of the skin, by exposure to light, including ultraviolet and infrared radiation.
phototherapeutic pho'to·ther'a·peu'tic (-thĕr'ə-pyū'tĭk) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
