diacritic
[adjective]
Synonyms: characteristic, diagnostic, distinctive, idiosyncratic, individual, peculiar, proper

[TahlilGaran] English Synonym Dictionary ▲

di‧a‧crit‧ic /ˌdaɪəˈkrɪtɪk/ noun [countable] technical
[Date: 1600-1700; Language: Greek; Origin: diakritikos, from krinein 'to separate']
a mark placed over, under, or through a letter in some languages, to show that the letter should be pronounced differently from the same letter without a mark
—diacritical adjective:
diacritical marks

[TahlilGaran] Dictionary of Contemporary English ▲