Lycopodium powder
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| a fine powder or dust composed of the spores of Lycopodium, and other plants of the order Lycopodiaceæ. It is highly inflammable, and is sometimes used in the manufacture of fireworks, and the artificial representation of lightning. |
See also: Lycopodium
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.