ampere-turn

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A unit of magnetomotive force in the meter-kilogram-second system equal to the magnetomotive force around a path linking one turn of a conducting loop carrying a current of one ampere.

Wiktionary

1. n. the unit of magnetomotive force

GNU Webster's 1913

1. (Elec.) A unit of magnetomotive force equal to the product of one complete convolution (of a coiled conductor) into one ampère of current.

WordNet 3.0

1. n. 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