Rabdology \Rab*dol"o*gy\ (r[a^]b*d[o^]l"[-o]*j[y^]), n. [Gr. "ra`bdos rod, stick + -logy: cf. F. rabdologie.] The method or art of performing arithmetical operations by means of Napier's bones. See {Napier's bones}. [Written also {rhabdology}.] [1913 Webster]
Rhabdology \Rhab*dol"o*gy\, n. Same as {Rabdology}. [1913 Webster]