%insolation%

n. [ L. insolatio: cf. F. insolation. ] [ 1913 Webster ]

1. The act or process to exposing to the rays of the sun for the purpose of drying or maturing, as fruits, drugs, etc., or of rendering acid, as vinegar. [ 1913 Webster ]

2. (Med.) (a) A sunstroke. (b) Exposure of a patient to the sun's rays; a sun bath. [ 1913 Webster ]

3. (Meteorology) The amount of sunlight impinging on the Earth's surface. [ PJC ]