pyramidion

[ pir-uh-mid-ee-uh n, -on ]

/ ˌpɪr əˈmɪd i ən, -ˌɒn /

a miniature pyramid, as at the apex of an obelisk.

Origin of pyramidion

1830–40; < New Latin, equivalent to pȳramid- pyramid + -ion diminutive suffix < Greek

In the plate attached to his essay, Hittorf gives us a plan and elevation of the pyramidion of the smaller obelisk of Luxor.

A History of Art in Ancient Egypt, Vol. II (of 2) |Georges Perrot
We may believe, then, that the pyramid of the ancient empire terminated in a pyramidion.

A history of art in ancient Egypt, Vol. I (of 2) |Georges Perrot
The short inscriptions of the pyramidion bear the oval of the king and the name of the divinity.

Museum of Antiquity |L. W. Yaggy
The pyramidion of the obelisk, on the other hand, was called benben by the Egyptians.

The New York Obelisk |Charles E. Moldenke

This finished, sloping masses were erected against it so as to form, with the pyramidion of the first mass, a second pyramid.

A history of art in ancient Egypt, Vol. I (of 2) |Georges Perrot