(1):
(a.) Of the nature of a disease which attacks many animals at the same time; - corresponding to epidemic diseases among men.
(2):
(a.) Of or pertaining to an epizoon.
(3):
(a.) Containing fossil remains; - said of rocks, formations, mountains, and the like.
(4):
(n.) An epizootic disease; a murrain; an epidemic influenza among horses.