The Collaborative International Dictionary of English v.0.48:

Midget \Midg"et\, n. [Dim. of midge.]
   1. (Zool.) A minute bloodsucking fly. [Local, U. S.]
      [1913 Webster]

   2. A very diminutive person having normal proportions of the
      body parts; compare dwarf.
      [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

midget
    adj 1: very small; "diminutive in stature"; "a lilliputian chest
           of drawers"; "her petite figure"; "tiny feet"; "the
           flyspeck nation of Bahrain moved toward democracy" [syn:
           bantam, diminutive, lilliputian, midget,
           petite, tiny, flyspeck]
    n 1: a person who is markedly small [syn: dwarf, midget,
         nanus]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "midget":
   Lilliputian, Tom Thumb, brownie, diminutive, dumpy, dwarf, dwarfed,
   dwarfish, elf, elfin, gnome, homunculus, incipient, lilliputian,
   manikin, meager, midge, miniature, minikin, nanoid, peewee,
   pip-squeak, pygmy, rudimental, rudimentary, runt, runty, scraggy,
   scrubby, shrimp, shriveled, shrunk, shrunken, squat, stunted,
   teeny, undersize, undersized, wart, wee, wizened