IQ Definition in the Cambridge English Dictionary
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IQnoun [C]

abbreviation forintelligencequotient (= a person’s ​level of ​intelligencemeasured by ​tests): a high/​low IQ an IQ ​test
(Definition of IQ from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "IQ" - British English Dictionary

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IQnoun [C or U]

uk   us   /aɪˈkjuː/
abbreviation forintelligencequotient: a ​measure of someone's ​intelligencefound from ​specialtests: Children with very low/high IQs often have ​problems at ​school. IQ is just one ​measure of ​intelligence.
(Definition of IQ from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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