au·​tom·​a·​tous | \-mətəs\

Definition of automatous 

: of, like, or suggestive of an automaton : automatic, mechanical the relentless automatous march of an army

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First Known Use of automatous

1646, in the meaning defined above

History and Etymology for automatous

Latin automatus, from Greek automatos

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The first known use of automatous was in 1646

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