billabong

n (Austral 澳) branch of a river that forms a backwater （形成回水的）河的支流.

bilabial, bilateral, bilateralism, bilaterally, bilberry, bile, bile-duct, bilge, bilharzia, bilingual, bilingually, bilious, biliousness, bilk, bill, bill of exchange, bill of fare, bill of lading, bill of rights, bill of sale, billboard, billet, billet-doux, billfold, billhook, billiard-, billiards, billion, billow, billowy, billposter (also billsticker), billy, billy-goat, billy-oh (also billy-o), biltong, bimetallic, bimetallism, bimonthly, bin, binary,