English

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

 

diaeresis

 noun
(British English) (US English dieresis) noun
BrE BrE//daɪˈerəsɪs//
 
; NAmE NAmE//daɪˈerəsɪs//
 
(pl. diaereses, diereses
BrE BrE//daɪˈerəsiːz//
 
; NAmE NAmE//daɪˈerəsiːz//
 
)
(specialist)
 
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the mark placed over a vowel to show that it is pronounced separately, as in naïve Word Origin late 16th cent. (denoting the division of one syllable into two): via Latin from Greek diairesis ‘separation’, from diairein ‘take apart’, from dia ‘apart’ + hairein ‘take’.