Glyph

A glyph ( GLIF) is any kind of purposeful mark. In typography, a glyph is "the specific shape, design, or representation of a character". It is a particular graphical representation, in a particular typeface (or computer font), of an element of written language. That "element" is called a grapheme – the conceptual abstraction of some letter, number or symbol, which is independent of the glyph designed to represent it in a particular font.