Entry 1 sense Webster, 1913 Leucoryx /(lū"kō̇*rĭks)/ · Leu·co·ryx · IPA 01 n. A large antelope of North Africa (Oryx leucoryx), allied to the gemsbok. 1. A large antelope of North Africa (Oryx leucoryx), allied to the gemsbok.(Zool.)