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 back of a whale.
Source: en.wiktionary.orgThe Hills were formed over 2,000 million years ago with granite being forced to the surface, then being eroded to produce smooth "whaleback dwalas" and broken kopjes, strewn with boulders and interspersed with thickets of vegetation. Source: Internet
The height of the dome was convert, still below the height reached in July 2005 when the whaleback collapsed. Source: Internet