The Collaborative International Dictionary
Pyramidally
Pyramidally \Py*ram"i*dal*ly\, adv. Like a pyramid.
Wiktionary
pyramidally
adv. Like a pyramid; in a pyramidal manner or shape.
Usage examples of "pyramidally".
Above the upper arches are three irregular-shaped openings, arranged pyramidally, the two lower being quatrefoiled, the upper sexfoiled.