rhebok
Concise Oxford English Dictionary © 2008 Oxford University Press:
rhebok /ˈriːbɒk/ (also reebok or rhebuck)
▶noun a small South African antelope with a woolly brownish-grey coat and short straight horns. [Pelea capreolus.]
– origin C18: from Du. reebok ‘roebuck’.
'rhebok' also found in these Oxford entries:

