(theology) Worship of the Sun; belief that the Sun is a god.
1905, Joseph McCabe (translator), Ernst Heinrich Philipp August Haeckel (author), The Riddle of the Universe: At the Close of the Nineteenth Century, Harper & Brothers Publishers, page 280:Sun-worship (solarism, or heliotheism) seems to the modern scientist to be the best of all forms of theism, and the one which may be most easily reconciled with modern monism.
Synonyms
(worship of the Sun) solarism, sun worship, heliolatry
