E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Scaglio’la.
Imitation marble, like the pillars of the Pantheon, London. The word is from the Italian scáglia (the dust and chips of marble); it is so called because the substance (which is gypsum and Flanders glue) is studded with chips and dust of marble.
