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Meaning of PITCHSTONE

Pronunciation:  'pich`stown

WordNet Dictionary
 
 Definition: [n]  dark acid granitic glass
 
 Websites: 
 
 See Also: volcanic glass

 

 

Webster's 1913 Dictionary
 
 Definition: 
\Pitch"stone`\, n. (Geol.)
An igneous rock of semiglassy nature, having a luster like
pitch.
 

 

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