The Collaborative International Dictionary of English v.0.48:

Case \Case\ (k[=a]s), n. [OF. casse, F. caisse (cf. It. cassa),
   fr. L. capsa chest, box, case, fr. capere to take, hold. See
   Capacious, and cf. 4th Chase, Cash, Enchase, 3d
   Sash.]
   [1913 Webster]
   1. A box, sheath, or covering; as, a case for holding goods;
      a case for spectacles; the case of a watch; the case
      (capsule) of a cartridge; a case (cover) for a book.
      [1913 Webster]

   2. A box and its contents; the quantity contained in a box;
      as, a case of goods; a case of instruments.
      [1913 Webster]

   3. (Print.) A shallow tray divided into compartments or
      "boxes" for holding type.
      [1913 Webster]

   Note: Cases for type are usually arranged in sets of two,
         called respectively the upper and the lower case. The
         upper case contains capitals, small capitals,
         accented and marked letters, fractions, and marks of
         reference: the lower case contains the small letters,
         figures, marks of punctuation, quadrats, and spaces.
         [1913 Webster]

   4. An inclosing frame; a casing; as, a door case; a window
      case.
      [1913 Webster]

   5. (Mining) A small fissure which admits water to the
      workings. --Knight.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "lower case":
   abecedarian, allographic, alphabetic, ascender, back, bastard type,
   beard, belly, bevel, black letter, blackface, body, bold-faced,
   boldface, cap, capital, case, chromotypic, chromotypographic,
   counter, descender, em, en, face, fat-faced type, feet, font,
   full-faced, graphemic, groove, ideographic, italic, letter,
   lettered, lexigraphic, ligature, lightface, literal, logogrammatic,
   logographic, logotype, majuscule, minuscular, minuscule, nick,
   phototypic, pi, pica, pictographic, point, print, roman,
   sans serif, script, shank, shoulder, small cap, small capital,
   stamp, stem, stereotypic, transliterated, type, type body,
   type class, type lice, typecase, typeface, typefounders,
   typefoundry, typographic, uncial, upper case, upper-case