Lewis & Short

servātrix, īcis, f. [servator].

  1. I. She that keeps or preserves, a (female) savior, deliverer, Ter. Hec. 5, 4, 16: sui, Cic. Fin. 5, 9, 26: servatrix celebrabere, Ov. M. 7, 50: cohortis Inachiae, Stat. Th. 5, 672.
    As an epithet of goddesses, Inscr. Gud. 31, 7; 52, 5; Inscr. Fabr. 470, 109 and 110: pectoris, protectress, guardian, Stat. Th. 12, 606.
  2. * II. With an abstr. object, an observer, fulfiller: convenientiae, App. Doctr. Plat. p. 15, 32.