smokeless powder

noun
any of various substitutes for ordinary gunpowder that give off little or no smoke, especially one composed wholly or mostly of guncotton.

Origin:
1885–90

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World English Dictionary
smokeless powder
 
n
any one of a number of explosives that burn with relatively little smoke. They consist mainly of nitrocellulose and are used as propellants

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
Smokeless powder means solid chemicals or solid chemical mixtures that function by rapid combustion.
Telescopic sights and smokeless powder are not allowed.
Since neither side used smokeless powder, the entire battlefield would be enveloped in smoke once the firing began.
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