from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An allergy that is activated by light
Sorry, no etymologies found.
As with poison ivy, for a photoallergy to develop a person must have exposure to the substance that resulted in no visible reaction, but alerted the immune system to recognize future exposures as something foreign.
Phototoxicity, photoallergy, and contact sensitization of nitro musk perfume raw materials.