late 14c., from Latin catoblepas, from Greek katobleps, from kato "downward" (related to kata-) + blepein "to look," but this might be ancient folk etymology. Name given by ancient authors to some African animal.
A wylde beest that hyghte Catoblefas and hath a lytyll body and nyce in all membres and a grete heed hangynge alway to-warde the erth. [John of Trevisa, translation of Bartholomew de Glanville's "De proprietatibus rerum," 1398]
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for catoblepas
The third species (Catoblepas taurina) is the “ko-koon” of the natives.
The “brindled gnoo” (Catoblepas gorgon) is the other species that inhabits the South of Africa.