Pizzicato is a string instrument technique that involves plucking a string.
Pizzicato is a string instruments technique that involves plucking on a string with a finger, instead of using the bow.
Regular pizzicato is marked on a score with abbreviation "pizz.", and cancelled (return to regular bowing) with "arco".
Left-hand pizzicato is usually indicated with a "+" above the note.
A Bartók pizzicato (or snap pizzicato) is played by pulling the string away from the instrument, such that when released the string snaps down onto the fingerboard. This is marked by a circle with a small line at the top placed above the note.