noun rhy·o·lite \ˈrī-ə-ˌlīt\

Definition of rhyolite

  1. :  a very acid volcanic rock that is the lava form of granite


play \ˌrī-ə-ˈli-tik\ adjective

Origin and Etymology of rhyolite

German Rhyolith, from Greek rhyax stream, stream of lava (from rhein) + German -lith -lite

First Known Use: 1861

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