不ふ定てい積せき分ぶん

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Meanings

1

noun

indefinite integral

mathematics

Mathematical term for the antiderivative of a function, including an arbitrary constant.

不negative, non-, bad

定determine, fix, establish

積volume, product (x*y), acreage

分part, minute of time, segment

定てい積せき分ぶん
定積分 is the definite integral, which computes a numerical value over an interval, while 不定積分 is the indefinite integral representing a family of functions.

Compound of 不定 (indefinite) + 積分 (integral). The term is a direct calque from Western mathematical terminology.