wa·ter·buck 
(wôtər-bŭk′, wŏtər-)
(wôtər-bŭk′, wŏtər-)n. pl. waterbuck or wa·ter·bucks
A large African antelope (Kobus ellipsiprymnus) that inhabits grasslands near water, having a shaggy coat and curved, ridged horns in the male.
[Translation of Afrikaans waterbok.]