[ˈkalkjʊləs], (Noun)

Definitions:
- the branch of mathematics that deals with the finding and properties of derivatives and integrals of functions, by methods originally based on the summation of infinitesimal differences. The two main types are differential calculus and integral calculus

- a particular method or system of calculation or reasoning

- a hard mass formed by minerals within the body, especially in the kidney or gall bladder
(e.g: biliary calculi)


Phrases:

Origin:
mid 17th century: from Latin, literally ‘small pebble (as used on an abacus)’