In the Baroque period, a mordant (the German or Scottish equivalent of "mordent") was what later came to be called an "inverted mordent" and what is now often called a "lower mordent". In the 19th century, however, the name "mordent" was generally applied to what is now called the "upper" mordent. Although mordents are now thought of as a single alternation between notes, in the Baroque period a "mordant" may have sometimes been executed with more than one alternation between the indicated note and the note below, making it a sort of inverted trill. Mordents of all sorts might typically, in some periods, begin with an extra "inessential note" (the lesser, added note), rather than with the "principal note" as shown in the examples here. The same applies to trills, which in the Baroque and Classical periods would begin with the added, upper note. A "lower" inessential note may or may not be chromatically raised (that is, with a natural, a sharp, or even a double sharp) to make it one semitone lower than the principal note.