Impěllent, a

& s. [Lat. impel lens, pr. par. of impello to impel.] A. As adj .: Impelling, or having the quality of impelling. "Such ponderous bodies do take an enforced flight from an exterior impellent swiftne ." - Boyle: Works , vi. 427. B. As subst.: Any power, force, or influence which impels or drives forward; an impulsive motive or power. "Very many bodies of visible bulk are set a moving by external impellents ." -Boyle: Works, v. 210.