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ordered pair

noun
1.
Mathematics. two quantities written in such a way as to indicate that one quantity precedes or is to be considered before the other, as (3, 4) indicates the Cartesian coordinates of a point in the plane.
Origin
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Contemporary definitions for ordered pairs
noun

in mathematics, a pair of distinct elements or two ordered numbers, often used to match numbers in relations or functions

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9
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