The Collaborative International Dictionary of English v.0.48:

Steenbok \Steen"bok`\ (-b[o^]k`), n. [D. steen stone + bok
   buck.] (Zool.)
   Same as Steinbock.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Steinbock \Stein"bock`\, n. [G. stein stone + bock buck, D. bok.
   Cf. Steenbok.] (Zool.)
   (a) The European ibex.
   (b) A small South African antelope (Nanotragus tragulus)
       which frequents dry, rocky districts; -- called also
       steenbok. [Written also steinboc, and steinbok;
       also called stonebock, and stonebuck.]
       [1913 Webster]

WordNet (r) 3.0 (2006):

steenbok
    n 1: small plains antelope of southeastern Africa [syn:
         steenbok, steinbok, Raphicerus campestris]