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propellant

Syllabification: (pro·pel·lant)

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Definition of propellant

a thing or substance that causes something to move or be driven forward or outward, in particular.
an inert fluid, liquefied under pressure, in which the active contents of an aerosol are dispersed.
an explosive that fires bullets from a firearm.
a substance used as a reagent in a rocket engine to provide thrust.

Origin:

mid 17th century: originally from Latin propellent- 'driving ahead (of oneself)', from the verb propellere, later from propel

As a noun, propellant is always spelled with the ending -ant.

Definition of propellant in the British & World English dictionary

Nearby words