ampere-turn

US: (am′pēr tûrn′, am pēr′-)

WordReference Random House Unabridged Dictionary of American English © 2025

am•pere-turn  (am′pēr tûrn′, am pēr′-), n. [Elect.]

1. Electricity one complete convolution of a conducting coil, through which one ampere of current passes.
2. Electricity the magnetomotive force produced by one ampere passing through one complete turn or convolution of a coil. Abbr.: At

• 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::

ampere-turn noun

1. a unit of magnetomotive force; the magnetomotive force produced by a current of 1 ampere passing through one complete turn of a coil. 1 ampere-turn is equivalent to 4π/10 or 1.257 gilberts