[ 'kalkjʊləs ]
■ noun
1》 ( plural ~es ) (also infinitesimal ~ ) the branch of mathematics concerned with the determination and properties of derivatives and integrals of functions, by methods based on the summation of infinitesimal differences.
↘a particular method or system of calculation or reasoning.
2》 ( plural calculi -lʌɪ , -li: ) Medicine a concretion of minerals formed in the kidney, gall bladder, or other organ.
↘another term for tartar .
Origin
C17: from L., lit. 'small pebble'.