資料來源 : Webster's Revised Unabridged Dictionary (1913)

Substyle \Sub"style`\, n. (Dialing)
   A right line on which the style, or gnomon, of a dial is
   erected; being the common section of the face of the dial and
   a plane perpendicular to it passing through the style.
   [Written also {substile}.] --Hutton.