Heliotherapy
/ˌhiːli.oʊˈθer.ə.pi/noun
The treatment of disease or health conditions by exposure to sunlight.
Did you know?The first element comes from Greek hēlios, the sun god’s name, so this word carries an old solar power vibe long before modern wellness culture.
Etymological Timeline
Ancient Greek
Greek
hḗlios (ἥλιος)
“the sun”
Ancient Greek
Greek
therapeía (θεραπεία)
“attendance, service, care; later medical treatment”
19th Century
English
heliotherapy
“treatment by exposure to sunlight”
Modern English
English
heliotherapy
“sunlight-based therapy”