Learn how to say Calculi correctly in English with this tutorial pronunciation video.

Oxford dictionary definition of the word calculus:

noun

1 (plural calculuses) (also infinitesimal calculus) [mass noun] 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.

2 (plural calculuses) a particular method or system of calculation or reasoning.

3 (plural calculi /-lʌɪ, -liː/) Medicine a hard mass formed by minerals within the body, especially in the kidney or gall bladder:

biliary calculi

another term for tartar.

Origin:

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