a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite
"The light bulb filament was made of tungsten because its high melting point makes it ideal for electrical applications."
A rare metallic chemical element (symbol W, from Latin wolframium) with an atomic number of 74.
"The tungsten filament inside the light bulb is made of a rare metallic chemical element known as tungsten."
In plain English: Tungsten is an extremely hard and heavy metal that gets very hot without melting, so it's often used to make light bulb filaments.
"The light bulb filament was made of tungsten to withstand high heat without melting."
The word comes from the Swedish term tungsten, which literally means "heavy stone." It combines tung (heavy) and sten (stone).