微积分学 wēijīfēnxué calculus Origin Definitions Defs Strokes Stroke Words Sentences Sents 微积分 微積分 wēijīfēn noun calculus calculus; the combined branch of mathematics covering 微分 wēifēn and 积分 jīfēn学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science