pizzicato

Plucking the string, as opposed to bowing (arco). Notated pizz. Players may put the bow down for extended pizzicato passages.
piano
C3 Bb4 Eb4 A4 E5 C6
forte
C3 B3 Eb4 D5 E5 C6

snap pizz. (Bartok pizz.)

Pulling the string upwards and allowing it to 'snap' sharply against the fingerboard. Notated snap pizz. Often used by Béla Bartók, hence the nickname.
C3 Bb3 Eb4 A4 F5 C6

pizzicato secco

A damped pizzicato. Notated secco.
Secco:

 

 

 

 

 

pizzicato tremolo

Rapid motion of the finger against the string. Notated pizz trem. Tiring to execute for long periods on the viola and rarely used.

 

 

 

 

glissando

Plucked glissando, notated gliss pizz. Note that it is possible to make a gliss away from an open string.
Gb3 Bb3 Bb4 E5

quasi guitar

Violin held sideways against the body and strummed. Notated quasi guitar. Make sure the chord shapes are simple!
quasi guitar

left hand pizz

Plucked with left hand rather than bowing hand. Notated with a + over the note. Use with extreme caution. The fingerings need to be very carefully considered.