noun Gnu n. (Written also gnoo) (Zool.) One of two species of large South African antelopes of the genus Catoblephas, having a mane and bushy tail, and curved horns in both sexes. Note: The common gnu or wildebeest (Catoblephas gnu) is plain brown; the brindled gnu or blue wildebeest (C. gorgon) is larger, with transverse stripes of black on the neck and shoulders.
Collaborative International Dictionary of English 0.48
| 
