Artificial intelligent assistant

antelucan

antelucan, a.
  (æntɪˈl(j)uːkən)
  [ad. L. antelūcānus before dawn; f. ante + lūc- (lux) light: see -an.]
  Of or pertaining to the hours just before dawn.

1654 Gayton Fest. Notes iii. vi. 103 All manner of Antelucan Labourers. a 1656 Bp. Hall Rem. 44 (T.) The Phosphorus of piety and antelucan devotion. a 1859 De Quincey Wks. X. 259 This practice of crepuscular ante-lucan worship, possibly having reference to the ineffable mystery of the resurrection.

Oxford English Dictionary

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