Mordent

A mordent is a musical ornament. An upper mordent is a short squiggle above the note. A lower mordent is the same, but also has a vertical line through the middle. If the upper mordent is the note C, you would play a rapid alternation of (C,D,C). For a lower mordent C, you would play (C,B,C). Always follow the key signatures for the upper and lower notes.