Noun
An ornament in the frieze of the Doric order, repeated at equal intervals. Each triglyph consists of a rectangular tablet, slightly projecting, and divided nearly to the top by two parallel and perpendicular gutters, or channels, called glyphs, into three parts, or spaces, called femora. A half channel, or glyph, is also cut upon each of the perpendicular edges of the tablet. See Illust. of Entablature.
Source: Webster's dictionaryAnother approach was to apply a broader corner triglyph (III.) but was not really satisfying. Source: Internet
A triglyph is a unit consisting of three vertical bands which are separated by grooves. Source: Internet
A triglyph is centered above every column, with another (or sometimes two) between columns, though the Greeks felt that the corner triglyph should form the corner of the entablature, creating an inharmonious mismatch with the supporting column. Source: Internet
Even worse, the last triglyph was not centered with the corresponding column. Source: Internet
However, final triglyph and column were often not centered. Source: Internet
The endmost triglyph is centered over the column rather than occupying the corner of the architrave. Source: Internet