- infinitesimal (adj.)
[infinitesimal 词源字典]
- 1710 (1650s as a noun), "infinitely small," from Modern Latin infinitesimus, from Latin infinitus "infinite" (see infinite) + -esimus, as in centesimus "hundredth." Related: Infinitesimally.[infinitesimal etymology, infinitesimal origin, 英语词源]