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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
.