The Collaborative International Dictionary dubertus Gibbartas \Gib*bar"tas\, n. [Cf. Ar. jebb[=a]r giant; or L. gibber humpbacked: cf. F. gibbar.] (Zo["o]l.) One of several finback whales of the North Atlantic; -- called also Jupiter whale. [Written also jubartas, gubertas, dubertus.]