ossidiana

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ossidiana (Wikipedia approfondimento) f sing(pl.: ossidiane)

  1. (mineralogia), (petrografia) roccia vulcanica completamente vetrosa , particolarmente nera , costituitasi per veloce raffreddamento della lava , utilizzata nell'epoca neolitica per la fabbricazione di arnesi e armi
un frammento di ossidiana
os | si | dià | na

IPA: /ossiˈdjana/

dal francese obsidienne e dal lat. tardo obsidiāna (lapide) cioè "(pietra) di Obsidio"

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