MONOPHONIC

mono, monophonic, single-channel

(adjective) designating sound transmission or recording or reproduction over a single channel

monophonic

(adjective) consisting of a single melodic line

Source: WordNet® 3.1

Etymology

Adjective

monophonic

(of sound reproduction) having a single channel; monaural (compare stereophonic)

(music) having a single melodic line and no harmony (compare polyphonic)

(orthography) having simple one-to-one mapping between letters and phonemes

Source: Wiktionary

Mon`o*phon"ic, a. Etym: [Mono- + Gr. (Mus.)

Definition: Single-voiced; having but one part; as, a monophonic composition; -- opposed to Ant: polyphonic.

Source: Webster’s Unabridged Dictionary 1913 Edition