Rietboc \Riet"boc\, n. [D. riet reed + bok buck.] (Zool.) The reedbuck, a South African antelope ({Cervicapra arundinacea}); -- so called from its frequenting dry places covered with high grass or reeds. Its color is yellowish brown. Called also {inghalla}, and {rietbok}. [1913 Webster]