Definition of mononucleosis in English:


Syllabification: mon·o·nu·cle·o·sis
Pronunciation: /ˌmänəˌn(y)o͞oklēˈōsəs


  • 1An abnormally high proportion of monocytes in the blood.
    More example sentences
    • Common benign causes include adenoviral illness in children, mononucleosis, and some pharmaceuticals, and these can usually be identified with a careful history and examination.
    • The flu gave way to mononucleosis and finally chronic fatigue syndrome, which sidelined him for several months.
    • These white blood cells help fight viral infections, and an increased number of ‘atypical’ lymphocytes usually indicates current infection with mononucleosis.
  • 1.1 short for infectious mononucleosis. Also called mono.

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