n. [ Gr. 'orykto`s dug (&unr_; to dig) + gnw^sis knowledge. ] Mineralogy. [ Obs. ] -- Or`yc*tog*nos"tic a. -- Or`yc*tog*nos"tic*al a. [ Obs. ] -- Or`yc*tog*nos"tic*al*ly adv. [Obs.] [1913 Webster]