substyle

• substile (line on which the gnomon is erected):

sub- +‎ style

substyle (plural substyles)

1. A secondary or subsidiary style.
   • 1997, Alison J. Ewbank, Fouli T. Papageorgiou, Whose Master's Voice?: The Development of Popular Music in Thirteen Cultures:

     In this way, breakdancing, hardbeat, acidhouse, acidbeat, hip-hop, punk, rockabilly and streetmusic make up a plurality of substyles launched by the record companies which take over the national markets, […]

2. A right line on which the style, or gnomon, of a sundial is erected, being the common section of the face of the dial and a plane perpendicular to it passing through the style.
   • 1699, Joseph Moxon, A Tutor to Astronomy and Geography […] , page 168:

     which is the distance of the Substyle from the Perpendicular […]

• “substyle”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.