(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. Compare epidemic.

(epidemiology) Like or having to do with an epizootic: epidemic among animals. / (geology, rare) Containing fossils. / Relating to epizoa; epizoic.

plural of epizootic

In the manner of an epizootic; in a way that affects a particular species or range of species. / Regarding epizootics; in the context of the study of epizootics.

The process, or the result of epizootizing

To make, or to become epizootic

A disease, often fatal, of wild ruminants, most notably white-tailed deer (Odocoileus virginianus), caused by Epizootic hemorrhagic disease virus transmitted by certain midges, especially the species Culicoides variipennis.