impetus

(redirected from impetuses)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia.

im·pe·tus

(im'pe-tŭs), The plural of this word is impetus, not impeti.
In psychoanalysis, the motor element of an instinct; the amount of force of the person's energy that the instinctive impulse demands.
[L. an onset, fr. im-peto, to attack]