Also touan. Native name in Australia for the Flying Squirrel or Flying Phalanger (genus Belideus).
1846. G. H. Haydon, Five Y. Exper. Australia Felix, iii. 57. The flying squirrel, or tuan, is much sought after for its fine fur.
1859. H. Kingsley, G. Hamlyn, xxxi. The Touan, the little grey flying squirrel, only begins to fly about at night.