Guitarrón

a large six-stringed, plucked instrument, usually part of a mariachi ensemble

Guitar

A stringed instrument with a long neck and a flat, hollow body. Its strings are plucked or strummed with the fingers.

Guiro 

A Latin American percussion instrument consisting of an open-ended, hollow gourd with parallel notches cut in one side

Gregorian chant

Church music with no rhythm and no harmony. Sung without music by a number of people. Named for Pope Gregory.

Grave

Italian for “slow and serious.”

Gong

A flat, circular metal disc which is hit with a mallet.

Gong

A metal disc with a turned down rim that makes a loud, booming sound when struck with a mallet.

Glockenspiel

A percussion instrument with a set of steel bars arranged like the keyboard of a piano. It is played either with two hammers, or with a piano keyboard.

Glissando

A rapid succession of notes, often played on the piano or harp by sliding the fingers quickly over the keys or strings.