From Longman Dictionary of Contemporary Englishdiacriticdi‧a‧crit‧ic /ˌdaɪəˈkrɪtɪk/ noun [countable] technical SLAa 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 marksOrigin diacritic (1600-1700) Greek diakritikos, from krinein “to separate”
