methoxsalen
noun
me·thox·sa·len
| \ me-ˈthäk-sə-lən
\
\
Medical Definition of methoxsalen
: a drug C12H8O4 used to increase the production of melanin in the skin upon exposure to ultraviolet light and in the treatment of vitiligo
— called also 8-methoxypsoralen, xanthotoxin