'propellent' definitions:

Definition of 'propellent'

(from WordNet)
adjective
Tending to or capable of propelling; "propellant fuel for submarines"; "the faster a jet plane goes the greater its propulsive efficiency"; "universities...the seats of propulsive thought" [syn: propellant, propellent, propelling, propulsive]
noun
Any substance that propels [syn: propellant, propellent]