Artificial intelligent assistant

twelver

† ˈtwelver1 Obs. slang.
  [f. twelve + -er1.]
  A coin worth twelve pence.

a 1700 B. E. Dict. Cant. Crew, Twelver, a Shilling. 1725 in New Cant. Dict. 1732 Tricks of Town 15 Coachmen..demanding t'other Twelver or Tester above their Fare.

Oxford English Dictionary

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