dieresis

1. n. The separation or resolution of one syllable into two; -- the opposite of synaeresis. Source: opted

2. n. A mark consisting of two dots [/], placed over the second of two adjacent vowels, to denote that they are to be pronounced as distinct letters; as, cooperate, aerial. Source: opted

3. n. Same as Diaeresis. Source: opted

4. n. a diacritical mark (two dots) placed over a vowel to indicate that it does not form a diphthong with an adjacent vowel Source: wordnet

5. 1. (Gram.) The separation or resolution of one syllable into two; -- the opposite of synæresis. 2. A mark consisting of two dots [..], placed over the second of two adjacent vowels, to denote that they are to be pronounced as distinct letters; as, coöperate, aërial. Same as Diæresis. Source: webster

6. Same as Diæresis. Source: adambom

7. n a diacritical mark (two dots) placed over a vowel in German to indicate a change in sound Source: ecdict

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