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plural fumers
One who makes or uses perfumes. examples
That which fumes, something that produces or emits smoke or other vapor. quotations examples
The best fumer concepts evaluated to date employ pyrotechnic type mixes with additives (burning rate modifiers, gaseous output modifiers) and/or gas flow-restricting baseplates.
1977, Frankford arsenal, Robert Trifiletti, Gas Generators for Base Drag Reduction, page 1
Tracers and fumers are small, smoke producing charges that are placed in projectiles. […] A fumer produces smoke at the proper rate to fill the partial vacuum that movement through the air creates behind the projectile.
1990, United States Department of the Army, Military Explosives, page 3-3