Bible Dictionaries
Brontograph

Webster's Dictionary

(1):

(n.) A tracing or chart showing the phenomena attendant on thunderstorms.

(2):

(n.) An instrument for making such tracings, as a recording brontometer.

Bibliography Information
Webster, Noah. Entry for 'Brontograph'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/brontograph.html. 1828.