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]