Meaning

noun the derivative of a function of two or more variables with respect to a single variable while the other variables are considered to be constant

noun a harmonic with a frequency that is a multiple of the fundamental frequency

adjective being or affecting only a part; not total

originFrom Middle English partiall, parcial, from Old French parcial (“biased or particular”), from Late Latin partiālis (“of or pertaining to a part”), from Latin pars (“part”).

Etymology from Wiktionary, CC BY-SA 3.0