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The current version of the vocabulary builder covers over 2720 words & is useful for students preparing for academic English examinations such as SAT, GRE, GMAT, etc. Now you can also listen to the pronunciation of words. - Refer a Friend.


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propellant (noun) substance, usually gas that drives something, a rocket for example, forward.

A propellant is a thing that propels something, or forces it forward. An explosive for firing a bullet is a propellant. The fuel that fires a rocket is a propellant. Any substance that forces a thing forward is a propellant.

  • Liquid Hydrogen is an important propellant used in rockets to fire them into air and space. Without it, the rocket cannot be fired.
  • Ordinary propellants are no use in sending rockets into space. Special propellants with extraordinary power alone can drive rockets forwards.
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Last Modified : 11-May 2009
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