Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† dĭācŏnus, i (collat. form in plur.: diacones, Vulg. Tim. 3, 8; 12: diaconibus, id. Phil. 1, 1), m., = διάκονος, in eccl. Lat., a servant or minister of the church, a deacon, Tert. Praescr. 3; Cod. Just. 1, 3, 6 et saep. —dĭācŏnissa, ae, f., a deaconess, Cod. Just. 1, 3, 9; Orell. Inscr. 4872 al.