Humpback
Humpback , noun
[Compare Hunchback.]
1.
A crooked back; a humped back. — Tatler
2.
A humpbacked person; a hunchback.
3.
(a) (Zoology) Any whale of the genus Megaptera, characterized by a hump or bunch on the back. Several species are known. The most common ones in the North Atlantic are Megaptera longimana of Europe, and Megaptera osphyia of America; that of the California coasts is Megaptera versabilis.
(b)
(Zoology) A small salmon (Oncorhynchus gorbuscha), of the northwest coast of America; the humpbacked salmon.