autogenous

adjective
  1. produced or generated from within; self-generated
  2. Usage: formal; technical
  3. relating to or denoting a welding process in which the metal parts are fused together without the addition of solder or other material
  4. Usage: technical; metallurgy
  5. relating to or denoting a vaccine made from bacteria or viruses isolated from the patient being treated
  6. Usage: medical; dated

Examples