The Collaborative International Dictionary of English v.0.48:

maxwell \maxwell\ n.
   A cgs unit of magnetic flux, abbreviated Mx; it is equal to
   the magnetic flux passing through one sqaure centimeter which
   is normal to a magnetic field of one gauss.

   Syn: Mx.
        [WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

maxwell
    n 1: a cgs unit of magnetic flux equal to the flux perpendicular
         to an area of 1 square centimeter in a magnetic field of 1
         gauss [syn: maxwell, Mx]
    2: Scottish physicist whose equations unified electricity and
       magnetism and who recognized the electromagnetic nature of
       light (1831-1879) [syn: Maxwell, J. C. Maxwell, James
       Clerk Maxwell]

U.S. Gazetteer Places (2000):

Maxwell, NE -- U.S. village in Nebraska
   Population (2000):    315
   Housing Units (2000): 131
   Land area (2000):     0.337448 sq. miles (0.873985 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.337448 sq. miles (0.873985 sq. km)
   FIPS code:            31220
   Located within:       Nebraska (NE), FIPS 31
   Location:             41.077761 N, 100.526066 W
   ZIP Codes (1990):     69151
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Maxwell, NE
    Maxwell


U.S. Gazetteer Places (2000):

Maxwell, NM -- U.S. village in New Mexico
   Population (2000):    274
   Housing Units (2000): 148
   Land area (2000):     0.474494 sq. miles (1.228933 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.474494 sq. miles (1.228933 sq. km)
   FIPS code:            47080
   Located within:       New Mexico (NM), FIPS 35
   Location:             36.539487 N, 104.542630 W
   ZIP Codes (1990):     87728
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Maxwell, NM
    Maxwell


U.S. Gazetteer Places (2000):

Maxwell, IA -- U.S. city in Iowa
   Population (2000):    807
   Housing Units (2000): 333
   Land area (2000):     1.146422 sq. miles (2.969218 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.146422 sq. miles (2.969218 sq. km)
   FIPS code:            50520
   Located within:       Iowa (IA), FIPS 19
   Location:             41.890232 N, 93.397657 W
   ZIP Codes (1990):     50161
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Maxwell, IA
    Maxwell