Definition of photodermatitis in US English:

photodermatitis

noun

Medicine
  • Skin disease, specifically of an inflammatory nature, caused by exposure to light, frequently as a manifestation of phototoxicity or photoallergy; an instance of this.

Origin

1930s. From photo- + dermatitis. Compare slightly earlier photodermatosis.

Pronunciation

photodermatitis

/ˌfəʊtəʊdəːməˈtʌɪtɪs/