1. A glass blown into a globe which is later flattened and spun to form a disk
   "Antique windows often feature crown glass with its characteristic swirls"
    
2. Optical glass of low dispersion and low refractive index
   "Optical crown glass is commonly used in the production of eyeglass lenses";
   - optical crown, optical crown glass

Derived forms: crown glasses

Type of: glass, optical glass

Encyclopedia: Crown glass