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

   2. (Arch.) A little pediment over a door or window.

   3. (Eccl.) A movable, decorative member in metal, carved
      wood, or, commonly, in rich stuff or in embroidery,
      covering the front of the altar. Frontals are usually
      changed according to the different ceremonies.

   4. (Med.) A medicament or application for the forehead.
      [Obs.] --Quincy.

   5. (Anat.) The frontal bone, or one of the two frontal bones,
      of the cranium.

   {Frontal} {hammer or helve}, a forge hammer lifted by a cam,
      acting upon a ``tongue'' immediately in front of the
      hammer head. --Raymond.