ALL meanings of psoralen
pso·ra·len
P p - noun psoralen a toxic substance, C 1 1 H 6 O 3 , found in certain plants, including parsnips, used to increase the response to ultraviolet light in the treatment of severe cases of acne and psoriasis. 1
- noun psoralen any of various naturally occurring photoreactive chemicals, found in some plants, some of which are used in the treatment of skin disorders such as psoriasis and vitiligo. 0
- noun psoralen any of various derivatives of coumarin used in drugs to treat psoriasis, etc.: when activated by sunlight it causes the skin to darken 0