The Collaborative International Dictionary of English v.0.48:

Leucoryx \Leu"co*ryx\ (l[=u]"k[-o]*r[i^]ks), n. [NL., from Gr.
   leyko`s + 'o`ryx a kind of gazelle.] (Zool.)
   A large antelope of North Africa (Oryx leucoryx), allied to
   the gemsbok.
   [1913 Webster]