If we're being pedantic, then there's also a more general definition of calculus, which is the first definition in Merriam-Webster: "a method of computation or

If we're being pedantic, then there's also a more general definition of calculus, which is the first definition in Merriam-Webster: "a method of computation or calculation in a special notation (as of logic or symbolic logic)." One example of this is the lambda calculus. Differential and integral calculus are just special cases of this general definition.