mononucleosis Meaning in the Cambridge English Dictionary
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Meaning of “mononucleosis” in the English Dictionary

"mononucleosis" in British English

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mononucleosisnoun [U]

uk   /ˌmɒn.əʊˌnjuː.kliˈəʊ.sɪs/  us   /ˌmɑː.noʊˌnuː.kliˈoʊ-/ mainly US (informal mono, UK usually glandular fever)
an ​infectiousdisease that has an ​effect on ​particularglands and makes you ​feelweak and ​sick for a ​longtime
(Definition of mononucleosis from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mononucleosis" in American English

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mononucleosisnoun [U]

 us   /ˌmɑn·əˌnu·kliˈoʊ·sɪs/ (short form mono)
a ​disease that ​causes a ​suddenfever, ​swelling of ​organs that ​producewhitebloodcells, and a ​sorethroat, and which can make a ​personfeelweak and ​ill for a ​longtime
(Definition of mononucleosis from the Cambridge Academic Content Dictionary © Cambridge University Press)
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