資料來源 : Webster's Revised Unabridged Dictionary (1913)

Invisible \In*vis"i*ble\, a. [F. invisible, L. invisibilis. See
   {In-} not, and {Visible}.]
   Incapable of being seen; not perceptible by vision; not
   visible.

         To us invisible, or dimly seen In these thy lowest
         works.                                   --Milton.

   {Invisible bird} (Zo["o]l.), a small, shy singing bird
      ({Myadestes sibilons}), of St. Vincent Islands.

   {Invisible green}, a very dark shade of green, approaching to
      black, and liable to be mistaken for it.