Source : Webster's Revised Unabridged Dictionary (1913)

Round-backed \Round"-backed`\, a.
   Having a round back or shoulders; round-shouldered.

Source : WordNet®

round-backed
     adj : having the back and shoulders rounded; not erect; "a little
           oldish misshapen stooping woman" [syn: {hunched}, {round-shouldered},
            {stooped}, {stooping}, {crooked}]