a venereal disease of horses and donkeys, caused by a protozoan (Trypanosoma equiperdum) and characterized by inflammation of the genitals and lymph nodes, and paralysis of the hind legs
See dourine in American Heritage Dictionary 4
(do͝o-rēnˈ)
noun
A contagious disease of horses, asses, and mules caused by the protozoan parasite Trypanosoma equiperdum, which is transmitted during copulation.