In details

Apothema - Origin of the word

The word apothem does not appear in Euclid's work or any other ancient Greek text, and is therefore an academic neologism. Apothem derives from French apothème (1751), neologism created from the radical apoth- (in apothesis), meaning action of laying aside, of depositing, influenced by the Greek hypothemabase for suffix -ema. In mathematics, the word was found only in 1822 in the work Elements of Geometry and Trigonometry, translated by French M. A. Legendre, edited by David Brewster.