Dictionary.net

A disease of horses and donkeys caused by Trypanosoma equiperdum. The disease occurs in Africa, the Americas, and Asia.

Mal de coit; a trypanosomiasis of horses, conveyed by the sexual act; it is caused by Trypanosoma equiperdum, and is characterized by inflammation of the genitals, glandular swelling, and paralysis of the hind quarters.

[French] A specific contagious disease of horses, marked by inflammation of the genitals, swelling of the lymphglands, and paralysis of the hind limbs.

A trypanosome disease of horses spread by coitus, also called mal de coit.