opus sectileyoudaoicibaDictYouDict[opus sectile 词源字典]
"A form of Roman floor decoration similar to mosaic but composed of pieces shaped individually to fit the design, rather than regularly shaped tesserae", Mid 19th cent. From classical Latin opus work + sectile, neuter of sectilis produced by cutting, used by Vitruvius of Roman floors.[opus sectile etymology, opus sectile origin, 英语词源]