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

Springing \Spring"ing\, n.
   1. The act or process of one who, or that which, springs.

   2. Growth; increase; also, that which springs up; a shoot; a
      plant.

            Thou blessest the springing thereof.  --Ps. lxv. 10.

   {Springing line of an arch} (Arch.), the horizontal line
      drawn through the junction of the vertical face of the
      impost with the curve of the intrados; -- called also
      {spring of an arch}.