# domino

> polyomino of order 2; polygon in the plane made of two equal-sized squares connected edge-to-edge

**Wikidata**: [Q3751781](https://www.wikidata.org/wiki/Q3751781)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Domino_(mathematics))  
**Source**: https://4ort.xyz/entity/domino-q3751781


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)