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Webster 1913 Edition

Sulphur-bottom

Sulˊphur-bot′tom

,

Noun.

(Zool.)

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

.