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 Definition Generically, a low explosive used as a propellant, now smokeless powder; the older black powder was used as a warhead filler before the invention of high explosives; also used in pyrotechnics [d] [e]
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 Workgroup categories Military, Chemistry and History [Categories OK]
 Subgroup category:  Chemical Engineering
 Talk Archive none  English language variant American English

Explaining my editing of the lede

Howard, I felt that the first sentence should include a parenthetical explanation that "gunpowder" includes "black powder" and "smokeless powder" because they were both mentioned a bit further into the lede without explaining that that they were sub-classes of gunpowder.

I also deleted the use of gunpowder in rocket motors because I assume you were referring to the very ancient use in rockets by the Chinese and others ... readers might assume that gunpowder was used as a propellant in modern rocket motors.

Other than that, I think the rest of my edits are self-explanatory. I hope that what I have done is useful.

One other point, I really don't like linking of words in a section to the following sub-sections of the that same section, as you have done with black and smokeless powder. The reader can see the subsections a few sentences later quite easily without needing the linking. However, that is simply a preference of mine that I don't feel too strongly about. Regards, Milton Beychok 22:48, 26 April 2010 (UTC)