E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Old-fashioned. A rude composition employed in satire among the ancient Romans. Also a peculiar metre, consisting of three iambics and a syllable over, joined to three trochees, according to the following nursery metre:
The queen was in the par-lour
The maids were in the garden
The Fescennine and Saturnian were the same, for as they were called Saturnian from their ancientness, when Saturn reigned in Italy, they were called Fescennine from Fescennina [sic], where they were first practised.Dryden: Dedication of Juvenal.