excitation

[ ek-sahy-tey-shuh n, -si- ]

/ ˌɛk saɪˈteɪ ʃən, -sɪ- /

noun

the act of exciting.

the state of being excited.

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.

Physics. a process in which a molecule, atom, nucleus, or particle is excited.

Also called drive. Electronics. the varying voltage applied to the control electrode of a vacuum tube.

Nearby words

excision biopsy, excitability, excitable, excitable area, excitant, excitation, excitation wave, excitative, excitatory postsynaptic potential, excite, excited

Origin of excitation

1350–1400; Middle English excitacioun < Late Latin excitātiōn- (stem of excitātiō), equivalent to Latin excitāt(us) (past participle of excitāre; see excite) + -iōn- -ion

Related forms

pre·ex·ci·ta·tion, nounsu·per·ex·ci·ta·tion, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for preexcitation

excitation

/ (ˌɛksɪˈteɪʃən) /

noun

the act or process of exciting or state of being excited

a means of exciting or cause of excitement

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

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for preexcitation (1 of 2)

preexcitation

[ prē′ĕk-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.

Medicine definitions for preexcitation (2 of 2)

excitation

[ ĕk′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.

Science definitions for preexcitation

excitation

[ ĕk′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.