mononucleosis noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of mononucleosis noun from the Oxford Advanced American Dictionary

mononucleosis

noun

NAmE//ˌmɑnoʊˌnukliˈoʊsəs//

(informal mono) [uncountable] (medical)

an infectious disease that causes swelling of the lymph nodes and makes the person feel very weak for a long time

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