Pal‐la″di‐um (păl‐lā″dĭ‐ŭm), n. [L., fr. Gr. Παλλάδιον, fr. Παλλάσ, -άδοσ, Pallas.]
1. (Gr. Antiq.) Any statue of the goddess Pallas; esp., the famous statue on the preservation of which depended the safety of ancient Troy.
2. Hence: That which affords effectual protection or security; a safeguard; as, the trial by jury is the palladium of our civil rights. Blackstone.