[ 'aləgrα:f ]
■ noun
1》 Linguistics each of two or more alternative forms of a letter of an alphabet or other unit of a writing system.
2》 Phonetics each of two or more letters or letter combinations representing a single phoneme in different words (e.g. the f of ‘fake’ and the ph of ‘phase’).
Derivatives
~ic adjective
Origin
1950s: from allo- + grapheme .