piecewise

[ pees-wahyz ]
/ ˈpisˌwaɪz /

adverb Mathematics.

denoting that a function has a specified property, as smoothness or continuity, on each of a finite number of pieces into which its domain is divided: a piecewise continuous function; a piecewise differentiable curve.

Origin of piecewise

First recorded in 1665–75; piece + -wise