Glossary of Terms:

phone jack

A 1/4-inch male connector commonly used on electronic musical instruments and professional audio equipment; A mono 1/4-inch phone plug uses two conductors (tip/sleeve), and a stereo 1/4-inch phone plug uses three conductors (tip/ring/sleeve).

Source:

Also refered as:   1/4-inch jack

Related terms:   1/4-inch plug   1/8-inch jack   1/8-inch plug   TRS   TS   XLR connector   balanced   headphones   input   mono jack   mono plug   output   phone plug   stereo jack   stereo plug   unbalanced