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.
Origin: 1555–65; Related forms
< Latin triglyphus
< Greek tríglyphos
thrice-grooved, equivalent to tri- tri-
tri·glyph·ic, tri·glyph·i·cal, adjective