pal ‧ la ‧ di ‧ um /pəˈleɪdiəm/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Modern Latin ; Origin: Pallas asteroid discovered a short time before the metal ]
a soft silver-white metal that is often combined with gold and silver, and used to cover an object with a very thin layer of metal. It is a chemical ↑ element : symbol Pd