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entablature of a Doric order building
An ornament in a Doric frieze, consisting of a projecting block having on its face two parallel vertical glyphs or grooves and two half grooves or chamfers on either vertical end, that separates the metopes.
[Latin trīglyphus, from Greek trigluphos : tri-, three; see trei- in Indo-European roots + gluphē, carving; see glyph.]
(Architecture) architect a stone block in a Doric frieze, having three vertical channels
[C16: via Latin from Greek trigluphos three-grooved, from tri- tri- + gluphē carving. See glyph]
triˈglyphic, triˈglyphical adj
a rectangular block between two metopes in a Doric frieze, having three vertical bands separated by two grooves or glyphs, with two half grooves or chamfers at the sides.
[1555–65; < Latin triglyphus < Greek tríglyphos triple-grooved =tri- tri- + -glyphos, adj. derivative of glyphḗ glyph]
tri•glyph′ic, tri•glyph′i•cal, adj.