A plant of the genus Lycopodium, which includes the club mosses.
The yellowish powdery spores of certain club mosses, especially Lycopodium clavatum, used in fireworks and explosives and as a covering for pills.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.