Artificial intelligent assistant

interregent

inteˈrregent Obs. rare.
  [inter- 2 b; after interrex.]
  = interrex.

1600 Holland Livy i. xvii. 13 The Interregent [interrex] having called a generall parliament [etc.]. Ibid. v. 201 When as..the Consuls had resigned their office, M. Furius Camillus was created Interregent.

Oxford English Dictionary

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