Bible Dictionaries
Oscillograph

Webster's Dictionary

(n.) An apparatus for recording or indicating alternating-current wave forms or other electrical oscillations, usually consisting of a galvanometer with strong field, in which the mass of the moving part is very small and frequency of vibration very high.

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