A person who studies or is an expert in pyramid structures, particularly ancient pyramids.

पिरामिड विशेषज्ञ

English Usage: The pyramidologist presented his findings on the Great Pyramid of Giza.

Hindi Usage: पिरामिड विशेषज्ञ ने गीज़ा के महान पिरामिड पर अपने निष्कर्ष प्रस्तुत किए।