A snap-pizzicato (also known as Bartok pizzicato
) is a strong pizzicato where the string is plucked vertically by snapping and rebounds off the fingerboard of the instrument (Wikipedia). It is denoted by a circle with a vertical line going from the center upwards outside the circle. While Lilypond does not have a pre-defined command to created this markup, it is easy to create a definition and place it directly into the lilypond file.