1. Colourless glass made of almost pure silica
   - quartz glass, quartz, lechatelierite, crystal

Type of: natural glass

• Ni-hard iron
• Ni-resist
• Ni-resist iron
• niacin
• Niagara
• Niagara Falls
• Niagara River
• Niamey
• nib
• nibbed
• nibble
• nibbler
• Nibelung
• Nibelungenlied
• niblick
• nicad
• Nicaea
• Nicaean
• Nicandra
• Nicandra physaloides
• Nicaragua
• Nicaraguan
• Nicaraguan capital
• Nicaraguan monetary unit
• niccolite