'Finsen light' definitions:

Definition of 'Finsen light'

From: GCIDE

Finsen light \Fin"sen light\ [After Prof. Niels R. Finsen (b. 1860), Danish physician.] (Med.) Highly actinic light, derived from sunlight or from some form of electric lamp, used in the treatment of lupus and other cutaneous affections. [Webster 1913 Suppl.]