Artificial intelligent assistant

percussor

perˈcussor
  (pəˈkʌsə(r), -ɛ(r))
  [a. L. percussor a striker, etc., agent-n. from percutĕre: see percuss v. Cf. mod.F. percusseur (Littré).]
  One who or that which percusses or strikes; spec. a small instrument for medical percussion, a percussion-hammer.

1890 in Cent. Dict. 1896 Allbutt's Syst. Med. I. 374 Dr. Granville's percussor.

Oxford English Dictionary

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