humpbacked

Having a hump on the back, either naturally or due to a medical condition.

All modern camels are humpbacked creatures, but the number of humps depends on the species.

Being a humpback bridge.

There was a little stream, or brook, never dry, flowing, now slow, now with torrential rapidity, for ever in its narrow ditch. Unsteadily a rustic bridge bestrode its dark waters, a rustic humpbacked bridge, in a state of extreme dilapidation.