单词	heliotherapy
释义	heliotherapy /ˌhiːlɪə(ʊ)ˈθɛrəpi / noun [mass noun] The therapeutic use of sunlight.The ancient Greeks employed whole-body sun exposure or heliotherapy in the treatment of disease, and lying nude in the sun was a popular pastime.... Early in the 20th century, the debate in the literature over the healthiness of heliotherapy and arc lamps provided the motivation for testing these ideas using animal models. Although heliotherapy has been practiced for at least 2400 years, there was very little objective evidence supporting its purported therapeutic influence.
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