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]