Definition of murrion:
(n) :
Obsolete spelling of murrain. [(archaic, uncountable) Infectious disease; pestilence, plague; (countable) sometimes used in curses such as a murrain on someone: an outbreak of such a disease; a plague.]
(n) :
Alternative spelling of morion. [(historical) A kind of open brimmed helmet used by footsoldiers in the 16th and 17th centuries, having no visor or bevor.]