Frictional
Pronunciation : Fric"tion*al
Part of Speech : a.
Definition : Defn: Relating to friction; moved by friction; produced by friction; as, frictional electricity. Frictional gearing, wheels which transmit motion by surface friction instead of teeth. The faces are sometimes made more or less V-shaped to increase or decrease friction, as required.
Source : Webster's Unabridged Dictionary, 1913