The Collaborative International Dictionary of English v.0.48:

Rim \Rim\, n. [As. rima, reoma, edge; cf. W. rhim, rhimp, a rim,
   edge, boundary, termination, Armor, rim. Cf. Rind.]
   1. The border, edge, or margin of a thing, usually of
      something circular or curving; as, the rim of a kettle or
      basin.
      [1913 Webster]

   2. The lower part of the abdomen. [Obs.] --Shak.
      [1913 Webster]

   Arch rim (Phonetics), the line between the gums and the
      palate.

   Rim-fire cartridge. (Mil.) See under Cartridge.

   Rim lock. See under Lock.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cartridge \Car"tridge\ (k[aum]r"tr[i^]j), n. [Formerly cartrage,
   corrupted fr. F. cartouche. See Cartouch.] (Mil.)
   A complete charge for a firearm, contained in, or held
   together by, a case, capsule, or shell of metal, pasteboard,
   or other material.
   [1913 Webster]

   Ball cartridge, a cartridge containing a projectile.

   Blank cartridge, a cartridge without a projectile.

   Center-fire cartridge, a cartridge in which the fulminate
      occupies an axial position usually in the center of the
      base of the capsule, instead of being contained in its
      rim. In the Prussian needle gun the fulminate is applied
      to the middle of the base of the bullet.

   Rim-fire cartridge, a cartridge in which the fulminate is
      contained in a rim surrounding its base.

   Cartridge bag, a bag of woolen cloth, to hold a charge for
      a cannon.

   Cartridge belt, a belt having pockets for cartridges.

   Cartridge box, a case, usually of leather, attached to a
      belt or strap, for holding cartridges.

   Cartridge paper.
   (a) A thick stout paper for inclosing cartridges.
   (b) A rough tinted paper used for covering walls, and also
       for making drawings upon.
       [1913 Webster]