dolmen

noun

1. 石室冢墓（在一组竖石顶端置大石板）
   a pair or group of vertical stones with a large flat stone on top, built in ancient times to mark a place where sb was buried

1. The most ancient form of megalithic construction may be the dolmen, a type of burial chamber consisting of several upright supports and a flat roofing slab.
   最古老形式的史前巨石建筑可能是石室冢墓，这是一种由数个直立的支撑物和一个平坦的屋顶构成的石室墓葬。

noun

1. a prehistoric megalithic tomb typically having two large upright stones and a capstone

   Synonym:    cromlechportal tomb