The Collaborative International Dictionary of English v.0.48:

Occidental \Oc`ci*den"tal\, a. [L. occidentalis; cf. F.
   occidental.]
   1. Of, pertaining to, or situated in, the occident, or west;
      western; -- opposed to oriental; as, occidental
      climates, or customs; an occidental planet.
      [1913 Webster]

   2. Possessing inferior hardness, brilliancy, or beauty; --
      used of inferior precious stones and gems, because those
      found in the Orient are generally superior.
      [1913 Webster]

WordNet (r) 3.0 (2006):

occidental
    adj 1: denoting or characteristic of countries of Europe and the
           western hemisphere; "occidental civilization"; "Hesperian
           culture" [syn: occidental, Hesperian]
    n 1: a native inhabitant of the Occident
    2: an artificial language

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "occidental":
   antarctic, arctic, austral, boreal, east, eastbound, easterly,
   eastermost, eastern, easternmost, hyperborean, meridional, north,
   northbound, northeast, northeasterly, northeastern, northerly,
   northern, northernmost, northwest, northwesterly, northwestern,
   oriental, south, southbound, southeast, southeasterly,
   southeastern, southerly, southern, southernmost, southwest,
   southwesterly, southwestern, west, westbound, westerly, western,
   westernmost



U.S. Gazetteer Places (2000):

Occidental, CA -- U.S. Census Designated Place in California
   Population (2000):    1272
   Housing Units (2000): 632
   Land area (2000):     4.983947 sq. miles (12.908364 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    4.983947 sq. miles (12.908364 sq. km)
   FIPS code:            53266
   Located within:       California (CA), FIPS 06
   Location:             38.421121 N, 122.954660 W
   ZIP Codes (1990):     95465
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Occidental, CA
    Occidental