a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body
"renal calculi can be very painful"
the branch of mathematics that is concerned with limits and with the differentiation and integration of functions
"Students in advanced high school classes often struggle to grasp calculus, which is the branch of mathematics concerned with limits and the differentiation and integration of functions."
Calculation; computation.
"The professor spent hours performing complex calculus to solve the engineering problem."
The word comes from the Latin term for a small pebble, which was originally used as a counting counter on an ancient calculating board. This meaning traveled into English to describe both those stones and later the mathematical branch of analysis involving rates of change.