Preexcitation

noun
1.
the act of exciting.
2.
the state of being excited.
3.
Electricity.

the application of voltage to an electric device, as an electron-tube circuit, an antenna, or a dynamotor, often for producing a magnetic field in the device.
the voltage applied.

4.
Physics. a process in which a molecule, atom, nucleus, or particle is excited.
5.
Also called drive. Electronics. the varying voltage applied to the control electrode of a vacuum tube.
noun
1.
the act or process of exciting or state of being excited
2.
a means of exciting or cause of excitement
3.

the current in a field coil of a generator, motor, etc, or the magnetizing current in a transformer
(as modifier): an excitation current

4.
the action of a stimulus on an animal or plant organ, inducing it to respond

preexcitation pre·ex·ci·ta·tion (prē’ěk-sī-tā’shən)
n.
Premature activation of part of the ventricular myocardium by an impulse that travels by an anomalous path and so avoids physiological delay in the atrioventricular junction.

excitation ex·ci·ta·tion (ěk’sī-tā’shən)
n.

The act of increasing the rapidity or intensity of the physical or mental processes; stimulation.

The complete, all-or-none response of a nerve or muscle to an adequate stimulus, ordinarily including propagation of excitation along the membranes of the cell or cells involved.

excitation
(ěk’sī-tā’shən)
The activity produced in an organ, tissue, or cell of the body that is caused by stimulation, especially by a nerve or neuron. Compare inhibition.