- 微积分 wēijīfēn calculuscalculus; the combined branch of mathematics covering [[微分|微分|wei1 fen1]] and [[积分|積分|ji1 fen1]]
- 积分器 jīfēnqì integratoran instrument or device used for integration, such as a circuit or mechanical device
- 积分学 jīfēnxué integral calculusThe branch of mathematics concerned with the properties, operations, and applications of integrals; one of the two main branches of [[微积分|微積分|wei1 ji1 fen1]], being the inverse of [[微分学|微分學|wei1 fen1 xue2]].
- 微积分学 wēijīfēnxué calculuscalculus; infinitesimal calculus
- 积分方程 jīfēnfāngchéng integral equationan equation in which an unknown function appears under an integral sign
- 不定积分 bùdìngjīfēn indefinite integralindefinite integral; antiderivative
- 积分榜 jīfēnbǎng leaderboarda table of scores or ranking chart used in sports leagues and exams to display cumulative points for individuals or teams
- 微积分基本定理 wēijīfēnjīběndìnglǐ fundamental theorem of calculusthe fundamental theorem of calculus, which links the concept of differentiating a function with the concept of integrating a function
- 椭圆积分 tuǒyuánjīfēn elliptic integral(mathematics) an integral of a specific type involving square roots of cubic or quartic polynomials
- 积分变换 jīfēnbiànhuàn integral transformintegral transform in mathematics
- 积分常数 jīfēnchángshù constant of integrationthe constant of integration in calculus
