01 n. A very large whalebone whale of the genus Sibbaldius, having a yellowish belly; especially, Sibbaldius sulfureus of the North Pacific, and …
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1.
A very large whalebone whale of the genus Sibbaldius, having a yellowish belly; especially, Sibbaldius sulfureus of the North Pacific, and Sibbaldius borealis of the North Atlantic; -- called also sulphur whale.(Zool.) Also: sulphur whale