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tuff

play
noun \ˈtəf\

Definition of tuff

  1. :  a rock composed of the finer kinds of volcanic detritus usually fused together by heat

tuff·a·ceous play \ˌtə-ˈfā-shəs\ adjective


Origin of tuff

earlier tuph, tuft porous rock, from Middle French tuf, from Old Italian tufo


First Known Use: 1815


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