Meaning of Marek's disease

Ma'rek's disease"

Pronunciation: (mar'iks, mär'-), [key]
— Vet. Pathol. Vet. Pathol.
  1. a contagious cancerous disease of poultry, caused by a herpesvirus and characterized by proliferation of lymphoid cells and paralysis of a limb or the neck. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.