Definition of diacritic noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌdaɪəˈkrɪtɪk//
; NAmE NAmE//ˌdaɪəˈkrɪtɪk//
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a mark such as an accent, placed over, under or through a letter in some languages, to show that the letter should be pronounced in a different way from the same letter without a mark Word Originlate 17th cent.: from Greek diakritikos, from diakrinein ‘distinguish’, from dia- ‘through’ + krinein ‘to separate’.
See the Oxford Advanced American Dictionary entry: diacritic