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TOEFL BNC: 35761 COCA: 20595

propellant

noun
/prəˈpelənt/
/prəˈpelənt/
[countable, uncountable]
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  1. a gas that forces out the contents of an aerosol喷射剂(如喷雾器中的压缩气体)
  2. a thing or substance that propels something, for example the fuel that fires a rocket推进剂(如发射火箭用的燃料)
  3. Word Originmid 17th cent.: originally from Latin propellent- ‘driving ahead (of oneself)’, from the verb propellere, later from propel.

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