Artificial intelligent assistant

ballistier

ballistier Obs. rare.
  In 7 balistier.
  [ad. L. ballistārius, f. ballista.]
  A soldier who worked or discharged a ballista.

1609 Holland Amm. Marcel. xvi. ii. 53 Men of armes and balistiers [Ballistariis], unmeet souldiers to protect..their ruler. Ibid. 221 The balistier himselfe.

   See also balister, etc.

Oxford English Dictionary

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