arithmetica (-orum)

Etymology:

• In Cicero always neut. plur., e.g. in arithmeticis satis versatus; later writers use the fem. sing. The pure Latin word is numeri, cf. De Fin. 1. 21. 72 an ille se, ut Plato, in musicis, geometria, numeris, astris contereret? So De Fin. 5. 29. 87 cur Plato Aegyptum peragravit, ut a sacerdotibus barbaris numeros et caelestia acciperet? Cf. Nägelsb. Lat. Stil. p. 46.