The Collaborative International Dictionary of English v.0.48:

Madecass \Mad"e*cass\, Madecassee \Mad`e*cas"see\, prop. n.
   1. A native or inhabitant of Madagascar, or Madecassee. See
      Malagasy
      [1913 Webster]

   2. The language of the natives of Madagascar.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Madecassee \Mad`e*cas"see\, prop. a.
   Of or pertaining to Madagascar or its inhabitants; now
   replaced by Madagascan. [archaic]
   [1913 Webster +PJC] Madefaction