megalith
me·ga·lith
noun
1.
memorial consisting of a very large stone forming part of a prehistoric structure (especially in western Europe)
Origin
PIE word *méǵh₂s From mega- (prefix meaning ‘very large, great’) + -lith (suffix meaning ‘stone’), a back-formation from megalithic probably modelled after monolith. from Ancient Greek λίθος (líthos, “stone”)
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Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.