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heliotherapy
heliotherapy n.
Brit. 
/ˌhiːlɪə(ʊ)ˈθɛrəpi/
, /ˌhiːlɪə(ʊ)ˈθɛrəpi/U.S. /ˌhilioʊˈθɛrəpi/
the treatment of disease by exposure to the sun's rays./ˌhilioʊˈθɛrəpi/ΘΚΠ
the world > health and disease > healing > medical treatment > treatment by fresh air, sunlight, etc. > [noun]
insolation1626
air bath1746
sea-bath1785
sun cure1853
air cure1856
climatotherapy1875
mountain cure1876
heliotherapy1890
climatotherapeutics1896
1890 J. S. Billings National Med. Dict. I. 627/2 Heliotherapy, treatment of disease by exposure to sunlight.
1903 Lancet 11 July 104/1 The fundamental principles and practical applications of helio~therapy and phototherapy.
1921 Glasgow Herald 15 July 10 For the information of medical practitioners interested in heliotherapy.
1928 A. Huxley Let. 23 May (1969) 297 My medical uncle..says that he has known TB of the intestine greatly benefited by heliotherapy.
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