The Collaborative International Dictionary of English v.0.48:

Astriction \As*tric"tion\, n. [L. astrictio.]
   1. The act of binding; restriction; also, obligation.
      --Milton.
      [1913 Webster]

   2. (Med.)
      (a) A contraction of parts by applications; the action of
          an astringent substance on the animal economy.
          --Dunglison.
      (b) Constipation. --Arbuthnot.
          [1913 Webster]

   3. Astringency. [Obs.] --Bacon.
      [1913 Webster]

   4. (Scots Law) An obligation to have the grain growing on
      certain lands ground at a certain mill, the owner paying a
      toll. --Bell.
      [1913 Webster]

   Note: The lands were said to be astricted to the mill.
         [1913 Webster]