(3 syl.). Anything written in four parts or books, as Childe Harold Anything compiled from four authors, as the Life of Thomas à Becket. Any history resting on the testimony of four independent authorities, as The Gospel History.
“The very authors of the Quadriloge itselfe or song of foure parts
... doe all with one pen and mouth acknowledge the same” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894