long barrow

noun Archaeology.

a funerary barrow having an elongate shape, sometimes constructed over a megalithic chamber tomb and usually containing one or more inhumed corpses along with artifacts: primarily Neolithic but extending into the Bronze Age.
Compare round barrow.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for long barrow

  • Their graves of long-barrow type are found not only in the chalk areas but on the margins of the lias formations.

    Ancient Man in Britain|Donald A. (Donald Alexander) Mackenzie