brontograph definition

  • noun:
    • A tracing or chart showing the phenomena attendant on thunderstorms.
    • a guitar for making such tracings, as a recording brontometer.
    • identical to brontometer.
    • An apparatus developed by Marvin (1899) for tracking any trend of noise, as thunder and/or release of a cannon.
    • A map or diagram showing the progress of the front of a thunder-storm through isobronts or comparable lines for consecutive hours.
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