'Substyle' definitions:

Definition of 'Substyle'

From: GCIDE
  • 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. [1913 Webster]