\Wa"ter buck`\ (Zo["o]l.)
A large, heavy antelope ({Kobus ellipsiprymnus}) native of
Central Africa. It frequents the banks of rivers and is a
good swimmer. It has a white ring around the rump. Called
also {photomok}, {water antelope}, and {waterbok}.
Note: The name is also applied to other related species, as
      the leche ({Kobus leche}), which has similar habits.