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Definition of Pitchstone
1. Noun. Dark acid granitic glass.
Generic synonyms: Volcanic Glass
Definition of Pitchstone
1. n. An igneous rock of semiglassy nature, having a luster like pitch.
Medical Definition of Pitchstone
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1. Noun. Dark acid granitic glass.
1. n. An igneous rock of semiglassy nature, having a luster like pitch.
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