Glyph
Glyphs are basically composite graphical objects where different geometric and visual attributes are used to encode multidimensional data structures in combination.
Glyphs in Typography
The specific graphical representation (shape) of a character is called a glyph. Glyphs are the minimal units of font information.
A character is a textual unit, whereas a glyph is a graphical unit. Sometimes several characters or only parts of one glyph — consider ligatures as an example.