Meaning of triglyph

tri•glyph

Pronunciation: (trī'glif"), [key]
— n. Archit.
  1. a structural member of a Doric frieze, separating two consecutive metopes, and consisting typically of a rectangular block with two vertical grooves or glyphs, and two chamfers or half grooves at the sides, together counting as a third glyph, and leaving three flat vertical bands on the face of the block. See diag. under column.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.