STONE AGE

I. noun Date: 1854 the first known period of prehistoric human culture characterized by the use of stone tools, a stage in a human institution or field of endeavor regarded as primitive, outmoded, or obsolete , II. adjective Date: 1865 of, relating to, or resembling the culture of the ~ especially in the use of stone implements , primitive, outmoded, or unsophisticated (as in ideas or technology) by currently accepted standards