Artificial intelligent assistant

occipitium

occiˈpitium Obs. rare.
  [L., = occiput, and more used.]
  = occiput.

1650 Bulwer Anthropomet. 16 If that of the Occipitium transgresse its bounds, the Head is acuminate. 1706 Phillips, Occiput or Occipitium.

Oxford English Dictionary

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