n :  a highly contagious viral disease of poultry that is characterized esp. by proliferation of lymphoid cells and is caused by a herpesvirus
 
Marek, Jozsef (1867-1952), Hungarian veterinarian. Marek first described the cancerous disease known as Marek's disease in 1907.
 
   
 
Similar sounding terms:  Mor·quio's disease 
 
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