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.