Lewis Short
(adjective) : pĕtītōrĭus, a, um, petitor.
* In gen., of or belonging to solicitation (post-class.): artes petitorias exercere,Mamert. Grat. Act. ad Jul. 16, 2.
* In partic., of or belonging to the prosecution of a judicial claim, petitory (post-class.): judicium,Dig. 6, 1, 36: formula,Gai. Inst. 4, 91 sq.—Hence, subst.: pĕtītōrĭum, ii, n., the complaint or declaration in a private action, Cod. Th. 10, 10, 29, § 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary