- an often fatal infectious disease of horses, camels, elephants, and dogs caused by a blood-infecting protozoan parasite, Trypanosoma evansi, transmitted by the bite of horseflies, characterized by fever, anemia, and emaciation.
- a tropical febrile disease of cattle, horses, camels, and dogs, characterized by severe emaciation: caused by the protozoan Trypanosoma evansi and transmitted by fleas
