real number Meaning in the Cambridge English Dictionary
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Meaning of “real number” in the English Dictionary

"real number" in British English

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real numbernoun [C]

us   specialized
a ​number that can be ​represented using a numberline
(Definition of real number from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"real number" in American English

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real numbernoun [C]

 us   /ˈri·əl ˈnʌm·bər, ˈril/
mathematics a ​number that can ​represented using a number line (= ​drawing that ​represents all the numbers that ​exist)
(Definition of real number from the Cambridge Academic Content Dictionary © Cambridge University Press)
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