1. A blue mineral of magnesium and iron and aluminium and silicon and oxygen; often used as a gemstone

Derived forms: cordierites

Type of: mineral

Encyclopedia: Cordierite

• cloakmaker
• cloakroom
• clobber
• cloche
• clock
• clock dial
• clock face
• clock golf
• clock in
• clock off
• clock on
• clock out
• clock pendulum
• clock radio
• clock speed
• clock time
• clock tower
• clock up
• clock watcher
• clock-watching
• clocking
• clockmaker
• clocks
• clocksmith
• clockwise