定てい積せき分ぶん

て

い

せ

き

ぶ

ん

Meanings

1

noun

definite integral

mathematics

Mathematical term for the integral of a function over a specified interval, yielding a numerical value.

determine, fix, establish

積volume, product (x*y), acreage

分part, minute of time, segment

不ふ定てい積せき分ぶん
不定積分 is an indefinite integral (antiderivative), while 定積分 is a definite integral evaluated over an interval.

Compound of 定 (てい, 'fixed, definite') + 積分 (せきぶん, 'integral'). The term is a direct calque from English 'definite integral'.