The Collaborative International Dictionary
Epizooty
epizootic \ep`i*zo*["o]t"ic\, n. [PJC] Epizootic \Ep`i*zo*["o]t"ic\, Epizooty \Ep`i*zo"["o]*ty\, n. [F. ['e]pizo["o]tie.]
A disease attacking many animals at the same time; an epizootic disease.
A murrain; an epidemic influenza among horses.
Wiktionary
epizooty
n. An epizootic disease or outbreak.