Wordnet 3.0
NOUN (1)
1.
a unit of magnetomotive force equal to the magnetomotive force produced by the passage of 1 ampere through 1 complete turn of a coil;
equal to 1.257 gilberts;
The Collaborative International Dictionary of English v.0.48:
ampere-turn \ampere-turn\, Ampere turn \Amp[`e]re turn\ (Elec.)
A unit of magnetomotive force equal to the product of one
complete convolution (of a coiled conductor) into one
amp[`e]re of current; thus, a conductor having five
convolutions and carrying a current of half an amp[`e]re is
said to have 21/2 amp[`e]re turns. The magnetizing effect of
a coil is proportional to the number of its amp[`e]re turns.
[Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):
ampere-turn
n 1: a unit of magnetomotive force equal to the magnetomotive
force produced by the passage of 1 ampere through 1
complete turn of a coil; equal to 1.257 gilberts