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}]