dieresis
Noun
Meaning
The separation or resolution of one syllable into two; -- the opposite of synaeresis.
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.
Same as Diaeresis.
Source: Webster's dictionarySynonyms
diaeresis
grave
acute
accent
tilde
diacritic
umlaut
cedilla
acute accent
grave accent
accent mark
diacritical mark
trema
diaereses
diereses