Couch

n.
  1. A bed or place for repose or sleep; particularly, in the United States, a lounge.
  2. Any place for repose, as the lair of a beast, etc.
  3. A mass of steeped barley spread upon a floor to germinate, in malting; or the floor occupied by the barley; as, couch of malt.
  4. (Painting & Gilding) A preliminary layer, as of color, size, etc.