The Collaborative International Dictionary of English v.0.48:

Conviciate \Con*vi"ci*ate\, v. i. [L. conviciatus, p. p. of
   conviciari to revile, fr. convicium loud reproach.]
   To utter reproaches; to raise a clamor; to rail. [Obs.]
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         To conviciate instead of accusing.       --Laud.
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