1. mononucleosis

noun. an acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream; not highly contagious; some believe it can be transmitted by kissing.


  • infectious disease
  • glandular fever
  • kissing disease
  • mono


  • -osis (English)
  • mono- (English)
  • μόνος (Ancient Greek (to 1453))
  • nucleus (English)
  • nucleus (Latin)

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Sentences with mononucleosis

1. Noun, singular or mass
Visit a physician if you have swollen neck glands and a sore throat to rule out tonsillitis, mononucleosis** and strep throat 1.