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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 brontograph
 雷暴自記器; 雷雨表

From: Webster's Revised Unabridged Dictionary (1913)

 Bron·to·graph n.  Meteor. (a) A tracing or chart showing the phenomena attendant on thunderstorms. (b) An instrument for making such tracings, as a recording brontometer.