whalebackWiktionary 原文构词拆分whale词根/词干+back词根/词干词源说明whale + back.(ship): From its whale-like appearance when fully loaded.释义（英文）名词 Noun(historical) A kind of cargo steamship with a hull that continuously curves above the waterline from vertical to horizontal.(geology) A landform (typically a sand dune) having the form of the 词族派生词（1）megawhaleback