pyramidist
/ˈpɪrəmɪdɪst/ /pɪˈramɪdɪst/noun
An expert or specialist in the structure and history of the Egyptian pyramids. Also: a person who believes in the occult or religious significance of the pyramids; a pyramidologist.
Origin
Late 19th century; earliest use found in Charles Smyth (1819–1900), astronomer. From pyramid + -ist. With later use in religious sense compare pyramidologist.