sudden prostration due to exposure to the sun or excessive heat
<noun.state>
incident solar radiation
<noun.phenomenon>
therapeutic exposure to sunlight
<noun.act>
Insolation \In`so*la"tion\, n. [L. insolatio: cf. F. insolation.] 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.
2. (Med.) (a) A sunstroke. (b) Exposure of a patient to the sun's rays; a sun bath.
3. (Meteorology) The amount of sunlight impinging on the Earth's surface. [PJC]