ETYM Cf. Hunchback.
1. A person whose back is hunched because of abnormal curvature of the upper spine; SYN. hunchback, crookback.
2. Large whalebone whale with long flippers noted for arching or humping its back as it dives; SYN. humpback whale, Megaptera novaeangliae.

1. A back with a hunch or hump, resulting from difformity.
2. A hunchbacked person.

Having a hump, as the back.