cromlech Meaning, Definition & Usage
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       noun a prehistoric megalithic tomb typically having two large upright stones and a capstone
       
       
portal tomb; dolmen.
 
WordNet
Crom"lech noun
Etymology
W.Definitions
(Archol.) A monument of rough stones composed of one or more large ones supported in a horizontal position upon others. They are found chiefly in countris inhabited by the ancient Celts, and are of a period anterior to the introduction of Christianity into these countries.