Source : WordNet®

malformed
     adj : so badly formed or out of shape as to be ugly; "deformed
           thalidomide babies"; "his poor distorted limbs"; "an
           ill-shapen vase"; "a limp caused by a malformed foot";
           "misshapen old fingers" [syn: {deformed}, {distorted},
           {ill-shapen}, {misshapen}]