Impulsion
Pronunciation : Im*pul"sion
Part of Speech : n.
Etymology : [L. impulsio: cf. F. impulsion. See Impel.]
Definition : 1. The act of impelling or driving onward, or the state of being impelled; the sudden or momentary agency of a body in motion on another body; also, the impelling force, or impulse. "The impulsion of the air." Bacon.
2. Influence acting unexpectedly or temporarily on the mind; sudden motive or influence; impulse. "The impulsion of conscience." Clarendon. "Divine impulsion prompting." Milton.
Source : Webster's Unabridged Dictionary, 1913