apothem

History and Etymology for apothem

borrowed from French apothème, of uncertain origin

Note: The term is most likely based on a presumed Greek *apóthema or *apóthēma, a derivative of apotithénai "to put away, put aside" (perhaps taken to mean "to place to the side"), parallel to hypóthēma "base, stand," a derivative of hypotithénai "to put under" (see apothecary). It is undetermined who first used the word, which appears as apotheme in the expanded fourth edition (Paris, 1710) of the French priest and mathematician Bernard Lamy's Les elemens de geometrie (first edition 1685).