Artificial intelligent assistant

vireton

vireton Obs. rare.
  In 6 vyre-.
  [a. OF. vireton (= Prov. viraton), f. virer to turn: cf. vire n.1, and Sp. and Pg. virote.]
  A cross-bow bolt so constructed as to rotate on its axis while flying.

c 1500 Melusine 269 They..saylled foorth by such wyse that it semed as it had be the vyreton of a Crosbow. Ibid. 287 No sarasyn durste hym abyde, but casted at him fro ferre sperys, darts, stones & arowes, vyretons & quarelles, with theire crosbowes.

Oxford English Dictionary

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