Pyramis | Webster's Dictionary of the English Language

pyramis
pȳrămis, ĭdis, f., = πυραμις (prob. Egyptian), I a pyramid , Cic. N. D. 2, 18, 47; Prop. 3 1, 55...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
pyramis
pȳramis īdis, f , πυραμίς, a pyramid, C., Pr., Ta. ...

An Elementary Latin Dictionary