oryx

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several African antelopes of the genus Oryx, including the gemsbok, having long, straight or slightly curved horns and a hump above the shoulders.

Century Dictionary and Cyclopedia

1. n. An old name of some North African antelope, very likely the algazel: now definitely applied to several species of the genus Oryx.
2. n. [capitalized] A genus of orygine antelopes with long horns in both sexes, without suborbital or inguinal glands, and of large size, with thick neck, high withers, and bushy tail. The horns are sometimes three feet long, perfectly straight or gently curved, annulated for some distance from the base, then smooth and tapering to a sharp point. The beisa antelope, O. beisa, is one of the best-known, supposed by some to have furnished the original of the unicorn of the ancients, the long horns seen in profile appearing as one. It inhabits North Africa, where is also found O. leucoryx, the algazel. The South African representative is O. capensis or O. gazella, the well-known gemsbok of the Dutch colonists. See cut under gemsbok.
3. n. In ornithology: The red and black cardinal of the Cape of Good Hope, a kind of weaverbird, Emberiza orix of Linnæus, now Ploceus (Pyromelana) oryx.
4. n. Hence— [capitalized] A genus of weaver-birds.
5. n. [capitalized] In entomology, a genus of coleopterous insects of the family Scarabæidæ.

Wiktionary

1. n. Any of several antelopes, of genus Oryx, native to Africa, the males and females of which have long, straight horns.

WordNet 3.0

1. n. large African antelope with long straight nearly upright horns