The Collaborative International Dictionary of English v.0.48:

Dalmatica \Dal*mat"i*ca\, n., Dalmatic \Dal*mat"ic\, n.[LL.
   dalmatica: cf. F. dalmatique.]
   1. (R. C. Ch.) A vestment with wide sleeves, and with two
      stripes, worn at Mass by deacons, and by bishops at
      pontifical Mass; -- imitated from a dress originally worn
      in Dalmatia.
      [1913 Webster]

   2. A robe worn on state ocasions, as by English kings at
      their coronation.
      [1913 Webster]