Source : Webster's Revised Unabridged Dictionary (1913)

Sciatheric \Sci`a*ther"ic\, Sciatherical \Sci`a*ther"ic*al\, a.
   [Gr. ?, fr. ? a sundial; ? a shadow + ? to hunt, to catch.]
   Belonging to a sundial. [Obs.] --Sir T. Browne. --
   {Sci`a*ther"ic*al*ly}, adv. [Obs.] --J. Gregory.