Club moss (Bot.), an evergreen mosslike plant, much used in winter decoration. The best know species is Lycopodium clavatum, but other Lycopodia are often called by this name. The spores form a highly inflammable powder. -- Club root (Bot.), a disease of cabbages, by which the roots become distorted and the heads spoiled. -- Club topsail (Naut.), a kind of gaff topsail, used mostly by yachts having a fore-and-aft rig. It has a short "club" or "jack yard" to increase its spread.
Club (klŭb), v. t. [imp. & p. p. Clubbed (klŭbd); p. pr. & vb. n. Clubbing.] 1. To beat with a club.