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1. A crooked back; a humped back.

2. A humpbacked person; a hunchback.

3. (Science: marine biology) Any whale of the genus Megaptera, characterised 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 M. Osphyia of America; that of the California coasts is M. Versabilis. A small salmon (Oncorhynchus gorbuscha), of the northwest coast of America.

Compare: hunchback.