资料来源 : Webster's Revised Unabridged Dictionary (1913)

   {French window} (Arch.), a casement window in two folds,
      usually reaching to the floor; -- called also {French
      casement}.

   {Window back} (Arch.), the inside face of the low, and
      usually thin, piece of wall between the window sill and
      the floor below.

   {Window blind}, a blind or shade for a window.

   {Window bole}, part of a window closed by a shutter which can
      be opened at will. [Scot.]

   {Window box}, one of the hollows in the sides of a window
      frame for the weights which counterbalance a lifting sash.

资料来源 : WordNet®

window box
     n : a long narrow box for growing plants on a windowsill