Source : Webster's Revised Unabridged Dictionary (1913)

Miserere \Mis`e*re"re\, n. [L., have mercy, fr. misereri to have
   mercy, fr. miser. See {Miser}.]
   1. (R. C. Ch.) The psalm usually appointed for penitential
      acts, being the 50th psalm in the Latin version. It
      commences with the word miserere.

   2. A musical composition adapted to the 50th psalm.

            Where only the wind signs miserere.   --Lowell.

   3. (Arch.) A small projecting boss or bracket, on the under
      side of the hinged seat of a church stall (see {Stall}).
      It was intended, the seat being turned up, to give some
      support to a worshiper when standing. Called also
      misericordia.

   4. (Med.) Same as {Ileus}.