retrofit
      n 1: a component or accessory added to something after it has
           been manufactured
      2: the act of adding a component or accessory to something that
         did not have it when it was manufactured; "the court
         ordered a retrofit on all automobiles"
      v 1: provide with parts, devices, or equipment not available or
           in use at the time of the original manufacture; "They
           car companies retrofitted all the old models with new
           carburetors"
      2: fit in or on an existing structure, such as an older house;
         "The mansion was retrofitted with modern plumbing"
      3: substitute new or modernized parts or equipment for older
         ones; "The laboratory retrofitted to meet the safety
         codes"
      [also: retrofitting, retrofitted]


 retrofitted
      See retrofit