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Mathematics. a method of calculation, especially one of several highly systematic methods of treating problems by a special system of algebraic notations, as differential or integral calculus.
Pathology. a stone, or concretion, formed in the gallbladder, kidneys, or other parts of the body.
Also called tartar. Dentistry. a hard, yellowish to brownish-black deposit on teeth formed largely through the mineralization of dead bacteria in dental plaques by the calcium salts in salivary secretions and subgingival transudates.
calculation; estimation or computation:
the calculus of political appeal.
Contemporary Examples

Joseph McElroy’s ‘Cannonball’ Is the Meta Iraq War Novel Tom LeClair July 24, 2013
‘The Bachelor’ and ‘The Bachelorette’: Inside the Racial Discrimination Lawsuit Jennifer L. Pozner May 20, 2012
ISIS Risks Everything to Declare a Caliphate J.M. Berger June 28, 2014
A Turning Point in the War Tunku Varadarajan June 28, 2010
America Has an Unannounced ISIS Strategy, And It Involves Iran Jacob Siegel September 5, 2014

Historical Examples

The Reclaimers Margaret Hill McCarter
A Manual of the Operations of Surgery Joseph Bell
The Unsolved Riddle of Social Justice Stephen Leacock
The Book of Humorous Verse Various
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 1 Various

noun (pl) -luses
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
any mathematical system of calculation involving the use of symbols
(logic) an uninterpreted formal system Compare formal language (sense 2)
(pathol) (pl) -li (-ˌlaɪ). a stonelike concretion of minerals and salts found in ducts or hollow organs of the body

Plural calculi (kāl’kyə-lī’) or calculuses

Note: Most modern sciences use calculus.


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  • Calculus-of-pleasure

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