pro·pel·lent /-ˈpɛlənt/
(a.)推進的
propellent
adj : 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, propelling,
propulsive]
n : something that propels [syn: propellant]