|The Simple English Wiktionary has a definition for: platinum.|
Platinum is a soft, heavy, white metal. It is a precious metal. It usually costs more than gold. In chemistry, platinum is element number 78, and its atoms have an atomic weight of 195 a.m.u.. The symbol for platinum is Pt, from Spanish platina meaning "little silver".
The most common use of Platinum is in a vehicle's catalytic converter.