A cromlech (sometimes also spelled "cromleh" or "cromlêh"; cf Welsh crom, "bent"; llech, "slate") is a megalithic construction made of large stone blocks. The word applies to two different megalithic forms in English, the first being an altar tomb (frequently called a "dolmen"), as William Borlase first denoted in 1769. A good example is at Carn Llechart. The second meaning of the name "cromlech" in English refers to large stone circles such as those found among the Carnac stones in Brittany, France.
Unlike in English, the word "cromlech" in many other languages (such as Azerbaijani, Armenian, French, Greek, Indonesian, Italian, Romanian, and Spanish) exclusively denotes a megalithic stone circle, whereas the word "dolmen" is used to refer to the type of megalithic altar tomb sometimes indicated by the English "cromlech". Also, more recently in English, scholars such as Aubrey Burl use "cromlech" as a synonym for "megalithic stone circle".
- Almendres Cromlech, the Cromlech of the Almendres megalithic complex, near Évora, Portugal
- Dinas Cromlech, a rock outcrop in the Llanberis Pass, Snowdonia, Wales
- Dolni Glavanak Cromlech, an oval stone circle near Dolni Glavanak, Bulgaria
- "Definition of CROMLECH". www.merriam-webster.com. Retrieved Apr 4, 2023.
- "CROMLECH English Definition and Meaning". Lexico.com. Archived from the original on January 2, 2020. Retrieved 2022-08-24.
- William Borlase (1769). Antiquities, Historical and Monumental, of the County of Cornwall. S. Baker and G. Leigh. Retrieved 12 April 2013.
- Cope, Julian (1998). The Modern Antiquarian: A Pre-millennial Odyssey Through Megalithic Britain : Including a Gazetteer to Over 300 Prehistoric Sites. Thorsons Pub. p. 281. ISBN 978-0-7225-3599-8.
- Aubrey Burl: A Guide to the Stone Circles of Britain, Ireland and Brittany. Yale University Press, New Haven 2006, ISBN 0-300-11406-0.