whale·back /ˈhwe(ə)lˌbæk, ˈwe(ə)l-/ 如鯨背狀的東西,鯨背船
Whale·back n. Naut. A form of vessel, often with steam power, having sharp ends and a very convex upper deck, much used on the Great Lakes, esp. for carrying grain. ◄ ►