stereo

(noun) reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound. Synonyms: stereophony, stereo system, stereophonic system.

(noun) two photographs taken from slightly different angles that appear three-dimensional when viewed together. Synonyms: stereoscopic picture, stereoscopic photograph.

(adj) designating sound transmission from two sources through two channels. Synonyms: stereophonic, two-channel.