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tuff definition

tuff (tuf)

noun

a porous igneous rock, usually stratified, formed by consolidation of volcanic ash, dust, etc.

Etymology: Fr tuf, earlier tufe, tuffe < It tufo, tufa

Related Forms:

  • tuffaceous tuffa′·ceous (-ā′s̸həs) adjective

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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