smokeless

[ smohk-lis ]

/ ˈsmoʊk lɪs /

emitting, producing, or having little or no smoke.

Origin of smokeless

First recorded in 1575–80; smoke + -less

smoke·less·ly, adverb smoke·less·ness, noun

Many recent improvements have been made in the production of gunpowder, the most important resulting in the smokeless powder.

Great Inventions and Discoveries |Willis Duff Piercy
Smokeless and even noiseless powders seem to have been sought for during the whole gunpowder period.

Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 |Various
The guy who refused to dig up, went sparkless and smokeless to bed.

The Road |Jack London
The smokeless steam-coal of South Wales guarded the heritage of Trafalgar.

Recent Developments in European Thought |Various

In addition they are not smokeless, and leave a considerable residue which in a gun would produce serious fouling.

Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 |Various

smokeless

/ (ˈsməʊklɪs) /

having or producing little or no smoke smokeless fuel