oscillograph
noun
os·cil·lo·graph ä-ˈsi-lə-ˌgraf 
ə-
: an instrument for recording alternating current wave forms or other electrical oscillations
oscillographic
ä-ˌsi-lə-ˈgra-fik ˌä-sə-lə-
adjective ˌä-sə-lə- oscillographically
ä-ˌsi-lə-ˈgra-fi-k(ə-)lē
adverb ˌä-sə-lə-
oscillography
ˌä-sə-ˈlä-grə-fē
noun 
Example Sentences
Recent Examples on the Web Looking more closely at the oscillograph, Van Praag found that shots three and four, and then shots seven and eight, are too close together to have been fired by the same gun. 
Tom Jackman, Washington Post, 6 June 2018
Tom Jackman, Washington Post, 6 June 2018 Word History
Etymology
International Scientific Vocabulary
First Known Use
1893, in the meaning defined above
Medical Definition
oscillograph
noun
os·cil·lo·graph -ˌgraf
: an instrument for recording alternating current waveforms or other electrical oscillations