Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: mononucleosis  ,mó-nu,n(y)oo-klee'ow-sis
  1. 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 mononucleosis, mono, glandular fever, kissing disease

Derived forms: mononucleosises

Type of: infectious disease

Encyclopedia: Mononucleosis