‖ bettong A species of Kangaroo rat, a nocturnal animal about the size of a hare. 1839Penny Cycl. XIV. 462/1 Mr. Ogilby describes (Zool. Proc. 1831) a fourth species, Hypsiprymnus setosus, known in the colony of New South Wales by the native name of Bettong Kangaroo.