In music, a monad is a single note or pitch.[1] The Western chromatic scale, for example, is composed of twelve monads. Monads are contrasted to dyads, groups of two notes, triads, groups of three, and so on.
^Castine, Peter (1994). Set Theory Objects: Abstractions for Computer-Aided Analysis and Composition of Serial and Atonal Music, p.33. ISBN978-3-631-47897-4.