What does addax mean?
The definition of addax
Ad”dax, n.
Etym: [Native name.] (Zoöl.)

One of the largest African antelopes (Hippotragus, or Oryx, nasomaculatus).

Note: It is now believed to be the Strepsiceros (twisted horn) of the ancients. By some it is thought to be the pygarg of the Bible.