Umlaut (zn):
umlaut(en) partial assimilation of a vowel.
(en) diacritical mark.
(en) vowel so assimilated., trema(en) diacritical mark consisting of two dots (¨) placed over a letter to indicate that it is sounded separately.
cached Via: Dbnary en WikiWoordenboeken
Via: Memodata.com