[meg-uh-lith] 
| a stone of great size, esp. in ancient construction work, as the Cyclopean masonry, or in prehistoric Neolithic remains, as dolmens or menhirs. |
| meg·a·lith (měg'ə-lĭth') n. A very large stone used in various prehistoric architectures or monumental styles, notably in western Europe during the second millennium B.C. meg'a·lith'ic adj. |
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