a. [ Cf. F. épizoötique. ] 1. (Zoöl.) Of or pertaining to an epizoön. [ 1913 Webster ]

2. (Geol.) Containing fossil remains; -- said of rocks, formations, mountains, and the like. [ Obs. ] [ 1913 Webster ]

Epizoötic mountains are of secondary formation. Kirwan. [ 1913 Webster ]

3. Of the nature of a disease which attacks many animals at the same time; -- corresponding to epidemic diseases among men. [ 1913 Webster ]

{ , n. [ F. épizoötie. ] 1. A contagious disease which attacks many animals at the same time; an epizootic disease; an epidemic among animals. [ 1913 Webster ]

2. A murrain; an epidemic influenza among horses. [ 1913 Webster ]