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BNC: 20863 COCA: 12738

calculus

noun
/ˈkælkjələs/
/ˈkælkjələs/
[uncountable]
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  1. the type of mathematics that deals with rates of change, for example in the slope of a curve or the speed of a falling object微积分(学)Topics Maths and measurementc2
    Word Originmid 17th cent.: from Latin, literally ‘small pebble (as used on an abacus)’.

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