ダイエレシス

noun

dieresis; diaeresis

Refers to the diacritical mark (¨) placed over a vowel to indicate that it is pronounced separately from the preceding vowel, as in naïve or Noël. Used in linguistic and typographic contexts.

• フランス語ごでは、ダイエレシスは母ぼ音いんが別べつ々べつに発はつ音おんされることを示しめす。

  In French, the dieresis indicates that vowels are pronounced separately.