The Collaborative International Dictionary of English v.0.48:

Oersted \Oer"sted\, n. [After Hans Christian Oersted, Danish
   physicist.] (Elec.)
   The C. G. S. unit of magnetic reluctance or resistance, equal
   to the reluctance of a centimeter cube of air (or vacuum)
   between parallel faces. Also, a reluctance in which unit
   magnetomotive force sets up unit flux.
   [Webster 1913 Suppl.] oesophagus

WordNet (r) 3.0 (2006):

oersted
    n 1: the magnetic field strength 1 cm from a unit magnetic pole
    2: Danish physicist (1777-1851) [syn: Oersted, Hans Christian
       Oersted]