What is "springbock"

Springbok \Spring"bok`\ (-b[o^]k`), Springbuck \Spring"buck`\ (-b[u^]k`), n. [D. springbok; springen to spring, leap + bok a he-goat, buck.] (Zo["o]l.) A South African gazelle ( Gazella euchore) noted for its graceful form and swiftness, and for its peculiar habit of springing lightly and suddenly into the air. It has a white dorsal stripe, expanding into a broad patch of white on the rump and tail. Called also springer. [Written also springboc, and springbock.]

n. (alternative form of springbok English)