1865, from helio- "sun" + -phobia "fear." Perhaps directly from German (where it was in use 1850s). Related: Heliophobe (1885); heliophobic (1886).
Entries linking to heliophobia
helio-
word-forming element meaning "sun," from Greek hēlios "sun" (from PIE root *sawel- "the sun").
-phobia
word-forming element meaning "excessive or irrational fear, horror, or aversion," from Latin -phobia and directly from Greek -phobia "panic fear of," from phobos "fear" (see phobia). In widespread popular use with native words from c. 1800. In psychology, "an abnormal or irrational fear." Related: -phobic.