Lewis & Short

pĕtītrix, īcis, f. [petitor]

  1. I. A female applicant or candidate for office (post-Aug.), Auct. Quint. Decl. 252.
  2. II. Judicial t. t., a female claimant or plaintiff (post-class.): contra petitricem pronuntiavit, Dig. 36, 1, 74 fin.