Source : Webster's Revised Unabridged Dictionary (1913)

Intorsion \In*tor"sion\, n. [L. intortio a curling, crisping:
   cf. F. intorsion. See {Intort}, and cf. {Intortion}.]
   1. A winding, bending, or twisting.

   2. (Bot.) The bending or twining of any part of a plant
      toward one side or the other, or in any direction from the
      vertical.