The Collaborative International Dictionary of English v.0.48:
Dotted \Dot"ted\, a.
Marked with, or made of, dots or small spots; diversified
with small, detached objects.
Dotted note (Mus.), a note followed by a dot to indicate an
increase of length equal to one half of its simple value;
thus, a dotted semibreve is equal to three minims, and a
dotted quarter to three eighth notes.
Dotted rest, a rest lengthened by a dot in the same manner
as a dotted note.
Note: Notes and rests are sometimes followed by two dots, to
indicate an increase of length equal to three quarters
of their simple value, and they are then said to be