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Definition of Abaculus
1. n. A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements.
Definition of Abaculus
1. Noun. (archaic) A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements; abaciscus. ¹
¹ Source: wiktionary.com