Rabdology
Pronunciation : Rab*dol"o*gy (-dol"o*jy), n. [Gr. "ra`bdos rod
Part of Speech : stick
Definition : Defn: The method or art of performing arithmetical operations by means of Napier's bones. See Napier's bones. [Written also rhabdology.]
+ -logy: cf. F. rabdologie.]
Source : Webster's Unabridged Dictionary, 1913