Ep`i*zo*öt"ic (?), a. [Cf. F. épizoötique.] 1. (Zoöl.) Of or pertaining to an epizoön.

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

Epizoötic mountains are of secondary formation.

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

{ Ep`i*zo"ö*ty (?), Ep`i*zo*öt"ic (?) }, n. [F. épizoötie.] An epizoötic disease; a murrain; an epidemic influenza among horses.

• Widespread disease that affects many individuals in a population of non-human animals
  
• Epidemiology An occurrence of a disease or disorder in a population of non-human animals at a frequency higher than that expected in a given time period.
  
• Like or having to do with an epizootic
       Epizootic plague occurred in the mice following introduction of rats from Europe.