Glossary of Terms:

TRS

Tip-Ring-Sleeve — A 1/4-inch or 1/8-inch plug or jack with three sections; one at the tip (+), one at the ring (-), and one at the sleeve (the ground connection).

Source: Yamaha

Also refered as:   Tip/Ring/Sleeve   stereo jack   stereo plug

Related terms:   1/4-inch jack   1/4-inch plug   1/8-inch jack   1/8-inch plug