Abaculus

·noun A small tile of glass, marble, or other substance, of various colors, used in making ornamental patterns in mosaic pavements.

← Abaculi × Abacus →

abaculus
ăbăcŭlus, i, m. dim. [abacus], a small cube or tile of colored glass for making ornamental pavements...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.