Alternative definition : NCI-GLOSS: A condition in which the skin or eyes become very sensitive to sunlight
or other forms of light. It can be caused by taking certain drugs, or rubbing certain
essential oils (scented liquid taken from plants) or other topical agents into the
skin. Phototoxicity causes sunburn, blisters, and other skin problems.; FDA: A nonimmunologic, chemically induced type of photosensitivity.;