a plant of a genus that includes the common clubmosses.
Genus Lycopodium, family Lycopodiaceae
(usually lycopodium powder or lycopodium seed) [mass noun] a fine flammable powder consisting of clubmoss spores, formerly used as an absorbent in surgery, in experiments in the physical sciences, and in making fireworks.
modern Latin, from Greek lukos 'wolf' + pous, pod- 'foot' (because of the claw-like shape of the root)
lycopodium in other Oxford dictionaries
Definition of lycopodium in the US English dictionary