tuff

play
noun \ˈtəf\

Definition of tuff

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

tuffaceous

play \ˌtə-ˈfā-shəs\ adjective

Origin and Etymology of tuff

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


First Known Use: 1815


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