calculus


Concise Oxford English Dictionary © 2008 Oxford University Press:
calculus /ˈkalkjʊləs/
noun
  • 1 (pl. calculuses) (also infinitesimal calculus) 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 (pl. calculi /-lʌɪ, -liː/) 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’.
'calculus' also found in these Oxford entries:

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