WordNet (r) 3.0 (2006):
propellent adj 1: 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] n 1: any substance that propels [syn: propellant, propellent]