aktograph

noun
ak·​to·​graph | \ ˈak-tə-ˌgraf\
plural -s

Definition of aktograph

: a device for recording the movements of a caged but not restrained experimental animal

First Known Use of aktograph

1915, in the meaning defined above

History and Etymology for aktograph

German, from Latin actus (past participle of agere to do, drive) + German -graph

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