The Collaborative International Dictionary of English v.0.48:
Lycopodium \Ly`co*po"di*um\, n. [NL., from Gr. ? wolf + ?, ?, a
A genus of mosslike plants, the type of the order
Lycopodiace[ae]; club moss.
Lycopodium powder, a fine powder or dust composed of the
spores of Lycopodium, and other plants of the order
Lycopodiace[ae]. It is highly inflammable, and is
sometimes used in the manufacture of fireworks, and the
artificial representation of lightning.