In linguistics, diaeresis, diæresis or dieresis, is the pronunciation of two adjacent vowels in two separate syllables rather than as a diphthong or vowel digraph, and also the name of the diacritic mark ( ¨ ) used to prompt the reader to pronounce adjacent vowels in this manner.It’s a mark that looks like two dots over a letter, and it signifies a shift in pronunciation. For ü hold down the Alt key and type 252 on the numeric keypad. The two dots in the French spelling naïf/naïve show that ai has not its normal pronunciation but is spoken as two separate vowels /a-i/. The "two dots" you ask about are known by a couple of different names: diaeresis (for Greek words), tréma (for French), and umlaut (German).What are the dots above i and j called? tittleA tittle or superscript dot is a small distinguishing mark, such as a diacritic in the form of a dot on a lowercase i or j. What does u with two dots mean? U-umlautU-umlaut. ” What does the letter A represent in chemistry? The Letter Ä With Two Dots Is an Umlaut. Historically speaking, the letters written above the letters (which I've seen still on German signs).What is two dots over a letter called? The diaeresis (/daɪˈɛriːsɪs/ dy-ERR-ee-sis also known as the tréma) and the umlaut (/ˈʊmlaʊt/) are two different homoglyphic diacritical marks.When that letter is an i or a j, the diacritic replaces the tittle: ï. The two dots above the o in Motörhead isn’t actually a diaeresis-it’s an umlaut. " Also, what does AU with two dots on top mean? The Letter Ä With Two Dots Is an Umlaut. The A with two dots (Ä) is pronounced like the english word "air", whereas the A with the ring (Å) is pronounced "oar", there is also an O with two dots (Ő) which is pronounced "eugh" - or What do the lines with dots over them in prescriptions mean? It is a way of writing numbers. Also, what do 2 dots over a letter mean? umlaut. What does two dots over a letter mean … The word is German and means “change of sound,” from um, “about,” and laut, “sound.