Differential
来自Big Physics
mid 17th century: from medieval Latin differentialis, from Latin differentia ‘difference’ (see differentia).
etymonline
differential (adj.)
1640s, "making or exhibiting a difference," from Medieval Latin differentialis, from Latin differentia "diversity, difference" (see difference). Related: Differentially. As a noun in mathematics, "an infinitesimal difference between two values of variable quantity," from 1704. Differential calculus is attested from 1702.
