Source : Webster's Revised Unabridged Dictionary (1913)

Convocate \Con"vo*cate\, v. t. [imp. & p. p. {Convocated}; p.
   pr. & vb. n. {Convocating}.] [L. convocatus, p. p. of
   convocare to convocate; con- + vocare to call. See {Vocal},
   and cf. {Convoce}.]
   To convoke; to call together. [Obs.] --May (Lucan).