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bacterioscopy

noun
bac·​te·​ri·​os·​co·​py
plural -es

Definition of bacterioscopy 

: microscopic examination or investigation of bacteria

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First Known Use of bacterioscopy

1884, in the meaning defined above

History and Etymology for bacterioscopy

bacteri- + -scopy

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The first known use of bacterioscopy was in 1884

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