The syllable first associated with the tonic of the key, now replaced by the syllable "Do" except in France. In the "fixed-Do" system, "Ut" (modernly called "Do") is always C.
See also
[Eng.]C;
[Fr.]Ut (m);
[Fr.]Do (m);
[Ger.]C (n);
[It.]Do (m);
[Sp.]Do.