[1] : The Collaborative International Dictionary of English v.0.48

cadillac \cadil"lac\, n. prob. from cadillac, a french town.
   a large pear, shaped like a flattened top, used chiefly for
   cooking. --johnson.

   2. from cadillac, the high-end expensive line of automobiles
      made by general motors, often thought of as the best
      american-made automobile. the best; -- metaphorical, from
      the automobile. often used in the phrase "the cadillac of
      . . . "
      pjc

[2] : U.S. Gazetteer (1990)

cadillac, mi city, fips 12320
  location: 44.24827 n, 85.41610 w
  population 1990: 10104 4298 housing units
  area: 17.3 sq km land, 4.6 sq km water
  zip codes: 49601

[3] : U.S. Gazetteer Places (2000)

cadillac, mi -- u.s. city in michigan
   population 2000:    10000
   housing units 2000: 4466
   land area 2000:     6.821254 sq. miles 17.666967 sq. km
   water area 2000:    1.779726 sq. miles 4.609468 sq. km
   total area 2000:    8.600980 sq. miles 22.276435 sq. km
   fips code:            12320
   located within:       michigan mi, fips 26
   location:             44.250962 n, 85.413696 w
   zip codes 1990:     49601
   note: some zip codes may be omitted esp. for suburbs.
   headwords:
    cadillac, mi
    cadillac

Cadillac >> C Words
Cadillac, definition of term: Cadillac
cadillac_pag1.html