triglyphic

from The Collaborative International Dictionary of English v.0.48

Triglyphic \Tri*glyph"ic\, Triglyphical \Tri*glyph"ic*al\, a.
   1. Consisting of, or pertaining to, triglyphs.
      [1913 Webster]

   2. Containing three sets of characters or sculptures.
      [1913 Webster]