Mar|ek's disease «MAIR ihks»,
a contagious disease of the lymph system of chickens, caused by a herpesvirus and resulting in paralysis, blindness, and tumors; fowl paralysis. It is the most common form of the avian leucosis complex.
╂[< Jacob Marek, a German veterinarian of the 1900's]
Useful english dictionary. 2012.