Grapheme
From Wikinfo
A grapheme designates a unit in written language. In a phonological orthography a grapheme corresponds to one phoneme. Different glyphs can represent the same grapheme — for example, the letter 'a' can be seen in two variants, with a hook at the top, and without.
References
- Adapted from the Wikipedia article, "Grapheme" http://en.wikipedia.org/wiki/Grapheme, used under the GNU Free Documentation License
