Collins English-English Dictionary

calculus ['kælkjυləs]

1. 1. n a branch of mathematics, developed independently by Newton and Leibniz. Both differential calculus and integral calculus are concerned with the effect on a function of an infinitesimal change in the independent variable as it tends to zero

2. 2. n any mathematical system of calculation involving the use of symbols

3. 3. n [logic] an uninterpreted formal system - Compare formal language

4. 4. n [pathol] a stonelike concretion of minerals and salts found in ducts or hollow organs of the body

5. 5. n [Etymology] C17: from Latin: pebble, stone used in reckoning, from calx small stone, counter