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Definition of Tuff
1. Noun. Hard volcanic rock composed of compacted volcanic ash. 
Definition of Tuff
1. n. Same as Tufa.
Definition of Tuff
1. a volcanic rock [n -S]
Medical Definition of Tuff
1. 
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1. Noun. Hard volcanic rock composed of compacted volcanic ash. 
1. n. Same as Tufa.
1. a volcanic rock [n -S]
1.