infectious mononucleosis
in·fec·tious·mononucleosis
noun
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
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WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.