From Longman Dictionary of Contemporary EnglishRelated topics: Mathscalculuscal‧cu‧lus /ˈkælkjələs/ noun [uncountable]HMthe part of mathematics that deals with changing quantities, such as the speed of a falling stone or the slope of a curved lineExamples from the Corpuscalculus• But Taylor worked six days a week at Midvale and studied chemistry and calculus on the side.• The Class of 2000 hits the books: calculus, chemistry, leadership courses.• Other subjects - like calculus or computing - can not be learned without some consciouseffort.• To split up work into its componentsmirrored the intellectualtradition of calculus.• One is usually wary of text books which avoid the use of calculus.• Some composerstodaydont even understand the simplecalculus, he said.• But without using calculus one can not show its elegance.• Treated as an instance of the Utilitariancalculus, the whole increasingly complicatedoperation would no doubt be quite unreal.Origincalculus(1600-1700)Latin"small stone, piece of mineral that forms in the body, stone used in counting", from calx; → CHALK1