Source : Webster's Revised Unabridged Dictionary (1913)

Obstipation \Ob`sti*pa"tion\, n. [L. obstipatio a close
   pressure; ob (see {Ob-}) + stipare to press.]
   1. The act of stopping up, as a passage. [Obs.] --Bailey.

   2. (Med.) Extreme constipation. [Obs.] --Hooper.

Source : WordNet®

obstipation
     n : severe constipation resulting from an obstruction in the
         intestines