The Collaborative International Dictionary of English v.0.48:

Deformed \De*formed"\, a.
   Unnatural or distorted in form; having a deformity;
   misshapen; disfigured; as, a deformed person; a deformed
   head. -- De*form"ed*ly, adv. -- De*form"ed*ness, n.
   [1913 Webster]