noun
trema; diaeresis
A diacritical mark (¨) placed over a vowel, especially in French, to indicate that it is pronounced separately from the preceding vowel. Also called ダイエレシス.
from French tréma
See also: ダイエレシス
フランス語の「naïf」の「ï」にはトレマが付いている。
In the French word 'naïf', the 'ï' has a trema.