LI-10: producing a new word when a specific grapheme is changed, added, or removed.
British Dictionary definitions for grapheme
grapheme
/ˈɡræfiːm/
noun
1.
(linguistics) one of a set of orthographic symbols (letters or combinations of letters) in a given language that serve to distinguish one word from another and usually correspond to or represent phonemes, e.g. the f in fun, the ph in phantom, and the gh in laugh
Derived Forms
graphemically, adverb
Word Origin
C20: from Greek graphēma a letter
Word Origin and History for grapheme
n.
1937, American English, from graph "letter, symbol" (see -graphy) + -eme "unit of language structure."