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   Tuff

   /təf/

   

   noun

   • 1. a light, porous rock formed by consolidation of volcanic ash.

   Word Origin mid 16th century: via French from Italian tufo, from late Latin tofus, Latin tophus (see tophus).

   Scrabble Points: 10

   • T

     1

   • U

     1

   • F

     4

   • F

     4

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