calculus/ˈkælkjuləs; `kælkjələs/ n(pl -li/ -laɪ; -ˌlaɪ/ or -luses/ -ləsɪz; -ləsɪz/) branch of mathematics, divided into two parts (differential calculus and integral calculus), that deals with problems involving rates of variation 微积分（学）.
牛津英汉双解词典