/ Dictionary / Index H heliotherapy: Meaning and Definition of Find definitions for: he•li•o•ther•a•py Pronunciation: (hē"lē-ō-ther'u-pē), [key] — n. treatment of disease by means of sunlight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heliotherapy (Thesaurus) heliotaxis heliotrope Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language