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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Shortenings, ultimately from the prefix mono- (“one, single”).
infectious mononucleosis, mononucleosis, glandular fever, kissing disease
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Classic usage
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Verbault — Brown corpus levels, WordNet definitions, Gutenberg corpus.
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