a crooked back; a humped back.-a humpbacked person; a hunchback.-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 m. osphyia of america; that of the california coasts is m. versabilis.-a small salmon (oncorhynchus gorbuscha), of the northwest coast of america.