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Meaning of Clactonian

Clac•to•ni•an

Pronunciation: (klak-tō'nē-un), [key]
— adj.
  1. of, pertaining to, or characteristic of a Lower Paleolithic culture in England marked by the production of tools made from stone flakes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.