palladium
/pəˈleɪdiəm/
noun
- A rare, silvery-white metallic element (symbol Pd) used in jewelry, electronics, and as a catalyst.
- Palladium is more expensive than silver but less costly than platinum.
- The catalytic converter in cars often contains palladium.
- She wore a ring made of palladium because it is hypoallergenic.
- Something that provides protection or safety; a safeguard.
- The constitution is often called the palladium of our liberties.
- Education is a palladium against ignorance and poverty.
- They viewed the ancient treaty as a palladium of peace.
Synonyms