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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Smoke·less pow·der. A high-explosive gunpowder whose explosion produces little, if any, smoke.  It is usually based on guncotton (nitrocellulose).
 

From: WordNet (r) 2.0

 smokeless powder
      n : an explosive (trade name Ballistite) that burns with
          relatively little smoke; contains pyrocellulose and is
          used as a propellant [syn: Ballistite]