abaculus
A*bac"u*lus, n.; pl. Abaculi. Etym: [L., dim. of abacus.] (Arch.) Defn: A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements. Fairholt.
A*bac"u*lus, n.; pl. Abaculi. Etym: [L., dim. of abacus.] (Arch.) Defn: A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements. Fairholt.