Noun
One skilled in geometry; a geometer; a mathematician.
Source: Webster's dictionaryTo understand this for sense it is not required that a man should be a geometrician or a logician, but that he should be mad. Thomas Hobbes
An irresistible passion that would induce me to believe in innate ideas, and the truth of prophecy, has decided my career. I have always loved liberty with the enthusiasm which actuates the religious man with the passion of a lover, and with the conviction of a geometrician. Gilbert du Motier, Marquis de Lafayette
A geometrician has learned to perform the most difficult demonstrations and calculations, as a monkey has learned to take his little hat off and on... Julien Offray de La Mettrie
God is like a skilful Geometrician. Thomas Browne