Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Something, such as an explosive charge or a rocket fuel, that propels or provides thrust.
  • n. A compressed inert gas, such as a fluorocarbon, that acts as a vehicle for discharging the contents of an aerosol container.
  • adj. Serving to propel; propelling.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. anything that propels
  • n. fuel, oxidizer, reaction mass or mixture for one or more engines (especially internal combustion engines or jet engines) that is carried within a vehicle prior to use
  • n. the compressed gas in a pressurised container (especially an aerosol can) that is used to expel a liquid
  • adj. Alternative spelling of propellent.

from The Century Dictionary and Cyclopedia

  • n. That which propels or drives forward; a propelling agent.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any substance that propels
  • adj. tending to or capable of propelling

Etymologies

propel +‎ -ant (Wiktionary)

Examples

  • The cost in propellant to go from one crater to another, as long as we stay on the same pole, is very small, almost negligible.

    Launch Date Now Set for LRO and LCROSS Moon Missions - NASA Watch

  • A modest fuel depot in orbit based upon existing upper stages would allow for the separation of propellant from the payload, and allow for easy segmentation of the total mass of a lunar launch.

    NASA Leadership Vacuum - NASA Watch

  • For nearly all spacecraft, the propulsion system, including the propellant, is a major fraction of the spacecraft.

    Things We Used To Do - NASA Watch

  • It’s just a small fission reactor where instead of using the steam to drive a turbine for electricity, you run it through a rocket nozzle to provide thrust (the propellant is usually hydrogen instead of water).

    NERVA | My[confined]Space

  • In a flash, the primer ignites the propellant, which is converted at nearly explosive speeds to gases.

    The Gun

  • But another propellant was a constellation of doctrines — about capitalism's "contradictions," "market failures" and the need for socialism, or at least "planning" through government control of the economy's "commanding heights."

    Conservatism: Not TBTF

  • The term “solid” in the title refers to the propellant, which has the consistency of hard rubber.

    Riding Rockets

  • And if we didn't have them, we'd have to use a lot of propellant, which is very inefficient.

    CNN Transcript Aug 1, 2005

  • To launch everything you need to Mars, you would need to lift about 300 tonnes this latter figure includes a lot of trans Mars injection propellant, which is cheap stuff, less than $1,000 per tonne.

    The Case for Mars

  • Up until the advent of the present war cotton formed the base of most of the so-called propellant explosives used in advanced warfare.

    Kelly Miller's History of the World War for Human Rights

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