heliolatry (n.)

word-forming element meaning "sun," from Greek hēlios "sun" (from PIE root *sawel- "the sun").

word-forming element meaning "worship of," used as an element in native formations from 19c. (such as bardolatry), from Greek -latreia "worship, service paid to the gods, hired labor," related to latron (n.) "pay, hire," latris "servant, worshipper," from PIE *le- (1) "to get" (see larceny).