excitation

noun

• 1 technical the application of energy to something, in particular:
• Physics the process in which an atom or other particle adopts a higher energy state when energy is supplied:thermal excitation
• Physiology the state of enhanced activity of a cell, organism, or tissue which results from its stimulation: these neurotransmitters can produce excitation or inhibition
• the application of current to the winding of an electromagnet to produce a magnetic field: continuous rotation of the motor by sequential excitation of the phase windings [as modifier]:two parallel coils with opposing excitation windings
• the application of a signal voltage to the control electrode of an electron tube or the base of a transistor.

• 2the action of exciting or the state of being excited; excitement:a state of sexual excitation