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Stone Age

the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods.
Origin of Stone Age
1860-65 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for stone-age

Stone Age

a period in human culture identified by the use of stone implements and usually divided into the Palaeolithic, Mesolithic, and Neolithic stages
(sometimes not capitals) of or relating to this period: stone-age man
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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stone-age in Science
Stone Age  
The earliest known period of human culture, marked by the use of stone tools. See Mesolithic, Neolithic, Paleolithic. See Note at Three Age system.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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stone-age in Culture

Stone Age definition

A period encompassing all of human history, perhaps several million years, before the Bronze Age. In the Stone Age, people learned to make and use stone tools and weapons.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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