0 a mark written over a vowel that shows it is pronounced separately from the vowel immediately before it, for example in the word naïve
The ending of a word and foot together within the verse is called a diaeresis.
The long lines of 8 + 7 syllables are sometimes divided again through diaeresis, and this can be mirrored in the melodic state.
Notes preceding a point of textual diaeresis are sometimes notated with a long note and in some manuscripts verses with and without diaeresis are notated with different rhythms.
For example, in the spelling "coperate", the diaeresis reminds the reader that the word has four syllables "co-op-er-ate", not three, "coop-er-ate".
The "diaeresis" and the "umlaut" are diacritics marking two distinct phonological phenomena.
The same symbol is also used as a diacritic in other cases, distinct from both diaeresis and umlaut.
The latter elision spans the diaeresis in the last line.
