Pronunciation: (mar'iks, mär'-), [key] Vet. Pathol.
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 fowl paralysis, range paralysis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.