ˈsōrələ̇n, ˈsȯr- noun
( -s )
Etymology: modification of New Latin Psoralea psoralea
: a substance C 11 H 6 O 3 found in some plants that photosensitizes mammalian skin and is used in conjunction with ultraviolet light to treat psoriasis ; also : any of various derivatives of psoralen having similar properties