from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Sensitivity or responsiveness to light.
- n. Medicine An abnormally heightened response, especially of the skin, to sunlight or ultraviolet radiation, caused by certain disorders or chemicals and characterized by a toxic or allergic reaction.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. sensitivity to light, especially a heightened response to light
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. sensitivity to the action of radiant energy
Sorry, no etymologies found.