megalith

megalith
noun
  1. (Archaeology)a large stone that forms a prehistoric monument (e.g. a standing stone) or part of one (e.g. a stone circle or chambered tomb)
    (考古)史前巨石(构成史前遗迹,如巨石柱,或作为遗迹的部分,如巨石阵或石墓等)
语源
  1. mid 19th cent.: back-formation from megalithic
英语宝典
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