addax, ācis, m. (an African word, acc. to Plin., l. c.),
the name of a wild animal in Africa , with crooked horns , Capra cervicapra, Linn.; Plin. 11, 37, 45, § 124.
·noun One of the largest African antelopes (Hippotragus, / Oryx, nasomaculatus). ...
Webster's Dictionary of the English Language