The Collaborative International Dictionary
Impellent
Impellent \Im*pel"lent\, a. [L. impellens, p. pr. of impellere.] Having the quality of impelling.
Impellent
Impellent \Im*pel"lent\, n.
An impelling power or force.
--Glanvill.
Wiktionary
impellent
a. Having the quality of being impelling. n. An impelling power or force.
WordNet
impellent
adj. forcing forward or onward; impelling; "an impellent power"; "an impellent cause"