'Smokeless powder' definitions:

Definition of 'smokeless powder'

From: WordNet
noun
An explosive (trade name Ballistite) that burns with relatively little smoke; contains pyrocellulose and is used as a propellant [syn: smokeless powder, Ballistite]

Definition of 'Smokeless powder'

From: GCIDE
  • Smokeless powder \Smoke"less pow"der\ A high-explosive gunpowder whose explosion produces little, if any, smoke. It is usually based on guncotton. [Webster 1913 Suppl. +PJC]