billon /bilˈən/

1. Base metal
2. Esp an alloy of silver with copper, tin, or the like

• tetradactyly
• tetradic
• tetradite
• tetradites
• tetradrachm
• tetradrachms
• tetrads
• tetradymite
• tetradymites
• Tetradynamia
• tetradynamous
• tetraethyl
• tetraethyl lead
• tetrafluoroethylene
• tetragon
• tetragonal
• tetragonally
• tetragonous
• tetragons
• tetragram
• tetragrammaton
• tetragrammatons
• tetragrams
• Tetragynia
• tetragynian