Source : Webster's Revised Unabridged Dictionary (1913)

   10. (Gr. Gram.) A mark to indicate aspiration or its absence.
       See {Rough breathing}, {Smooth breathing}, below.

   {Breathing place}.
       (a) A pause. ``That c[ae]sura, or breathing place, in the
           midst of the verse.'' --Sir P. Sidney.
       (b) A vent.

   {Breathing time}, pause; relaxation. --Bp. Hall.

   {Breathing while}, time sufficient for drawing breath; a
      short time. --Shak.

   {Rough breathing} ({spiritus asper}) ([spasp]). See 2d
      {Asper}, n.

   {Smooth breathing} ({spiritus lenis}), a mark (') indicating
      the absence of the sound of h, as in 'ie`nai (ienai).