calculus
[ kalkyuhluh s ]
/ ˈkæl kyə ləs /

noun, plural cal·cu·li [kalkyuhlahy] /ˈkæl kyəˌlaɪ/, cal·cu·lus·es.
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 brownishblack 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.
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Origin of calculus
1610–20; < Latin: pebble, small stone (used in reckoning), equivalent to calc (stem of calx stone) + ulus ule
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for calculi
British Dictionary definitions for calculi
calculus
/ (ˈkælkjʊləs) /
noun plural 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
plural li (ˌlaɪ) pathol a stonelike concretion of minerals and salts found in ducts or hollow organs of the body
Word Origin for calculus
C17: from Latin: pebble, stone used in reckoning, from calx small stone, counter
Collins English Dictionary  Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for calculi
calculus
1660s, from Latin calculus "reckoning, account," originally "pebble used as a reckoning counter," diminutive of calx (genitive calcis) "limestone" (see chalk (n.)). Modern mathematical sense is a shortening of differential calculus. Also used from 1732 to mean kidney stones, etc., then generally for "concretion occurring accidentally in the animal body," such as dental plaque. Related: Calculous (adj.).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for calculi
calculus
[ kăl′kyələs ]
n. pl. cal•cu•lus•es
An abnormal concretion in the body, usually formed of mineral salts and most commonly found in the gallbladder, kidney, or urinary bladder.stone
Dental tartar.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for calculi
calculus
[ kăl′kyələs ]
Plural calculi (kăl′kyəlī′) calculuses
The branch of mathematics that deals with limits and the differentiation and integration of functions of one or more variables. See more at calculus of variations differential calculus integral calculus.
A solid mass, usually composed of inorganic material, formed in a cavity or tissue of the body. Calculi are most commonly found in the gallbladder, kidney, or urinary bladder. Also called stone
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Culture definitions for calculi
calculus
The branch of mathematics, usually studied after algebra, that provides a natural method for describing gradual change.
Note
Most modern sciences use calculus.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.