1. The resolution of a diphthong or syllable into two; the mark placed over two vowels, denoting that they are to be separately pronounced, as aer.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• diocesis,
• disress,
• deress,
• dieseses,
• diress,
• diaresis,
• diearesis,
• diaeresis,
• diarhesis,
• sieresis,
• xieresis,
• diresis,
• dyeresis,
• dierasis,
• dieresys,
• piereis,
• diereses,
• Dierases,
• Dyegesis,
• gudieress

• diaeresis,
• diuresis.

The adjective form of the word "dieresis" is "diaeretic".

The plural of the "dieresis" can be the "diereses".

The singular of the "dieresis" can be the "dieresis".