heliotherapy
he·liot·he·rapy
noun
1.
therapeutic exposure to sunlight
Origin
From helio- + therapy.
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.