'mononucleosis' definitions:
Definition of 'mononucleosis'
From: WordNet
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 [syn: infectious mononucleosis, mononucleosis, mono, glandular fever, kissing disease]