A Roman flooring material consisting of broken tiles and other fragments mixed with lime mortar.
| 单词 | θ217053 | 
| 释义 | society > occupation and work > materials > derived or manufactured material > cement or mortar > 			[noun]		 > mixed with broken tiles or pottery (2)		 opus signinum1745 A Roman flooring material consisting of broken tiles and other fragments mixed with lime mortar. torba1910 A primitive kind of cement made with broken pottery, traditionally used in Malta for the floors of buildings. Frequently attributive. | 
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