The Collaborative International Dictionary of English v.0.48:

Lucerne \Lu"cerne\, n. (Bot.)
   See Lucern, the plant.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lucern \Lu"cern\, n. [F. luzerne.] (Bot.)
   A leguminous plant (Medicago sativa), having bluish purple
   cloverlike flowers, cultivated for fodder; -- called also
   alfalfa. [Written also lucerne.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

lucerne
    n 1: important European leguminous forage plant with trifoliate
         leaves and blue-violet flowers grown widely as a pasture
         and hay crop [syn: alfalfa, lucerne, Medicago sativa]

U.S. Gazetteer Places (2000):

Lucerne, WY -- U.S. Census Designated Place in Wyoming
   Population (2000):    525
   Housing Units (2000): 224
   Land area (2000):     19.790164 sq. miles (51.256286 sq. km)
   Water area (2000):    0.650437 sq. miles (1.684623 sq. km)
   Total area (2000):    20.440601 sq. miles (52.940909 sq. km)
   FIPS code:            48240
   Located within:       Wyoming (WY), FIPS 56
   Location:             43.718022 N, 108.170416 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Lucerne, WY
    Lucerne


U.S. Gazetteer Places (2000):

Lucerne, MO -- U.S. village in Missouri
   Population (2000):    92
   Housing Units (2000): 53
   Land area (2000):     0.249003 sq. miles (0.644915 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.249003 sq. miles (0.644915 sq. km)
   FIPS code:            44372
   Located within:       Missouri (MO), FIPS 29
   Location:             40.462961 N, 93.290521 W
   ZIP Codes (1990):     64655
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Lucerne, MO
    Lucerne


U.S. Gazetteer Places (2000):

Lucerne, CA -- U.S. Census Designated Place in California
   Population (2000):    2870
   Housing Units (2000): 1814
   Land area (2000):     6.108969 sq. miles (15.822157 sq. km)
   Water area (2000):    13.365606 sq. miles (34.616758 sq. km)
   Total area (2000):    19.474575 sq. miles (50.438915 sq. km)
   FIPS code:            44406
   Located within:       California (CA), FIPS 06
   Location:             39.087790 N, 122.791108 W
   ZIP Codes (1990):     95458
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Lucerne, CA
    Lucerne