Dominoes is a family of games played with rectangular "domino" tiles.
Each domino is a rectangular tile with a line dividing its face into two square ends.
Each end is marked with a number of spots (also called pips, nips, or dobs) or is blank.
The backs of the dominoes in a set are indistinguishable, either blank or having some common design.
The domino gaming pieces (colloquially nicknamed bones, cards, tiles, tickets, stones, chips, or spinners) make up a domino set, sometimes called a deck or pack.
The traditional Sino-European domino set consists of 28 dominoes, featuring all combinations of spot counts between zero and six.
A domino set is a generic gaming device, similar to playing cards or dice, in that a variety of games can be played with a set.
The earliest mention of dominoes is from Song dynasty China found in the text Former Events in Wulin by Zhou Mi (1232–1298).
European-style dominoes are traditionally made of bone or ivory, or a dark hardwood such as ebony, with contrasting black or white pips (inlaid or painted).
Alternatively, domino sets have been made from many different natural materials: stone (e.g., marble, granite or soapstone); other hardwoods (e.g., ash, oak, redwood, and cedar); metals (e.g., brass or pewter); ceramic clay, or even frosted glass or crystal.
These sets have a more novel look, and the often heavier weight makes them feel more substantial; also, such materials and the resulting products are usually much more expensive than polymer materials.
Modern commercial domino sets are usually made of synthetic materials, such as ABS or polystyrene plastics, or Bakelite and other phenolic resins; many sets approximate the look and feel of ivory while others use colored or even translucent plastics to achieve a more contemporary look.