crown glass

/kraʊn glæs/

Definitions of crown glass

1. noun

   optical glass of low dispersion and low refractive index
   synonyms: optical crown, optical crown glass

   type of:

   optical glass

   clear homogeneous glass of known refractive index; used to make lenses
2. noun

   a glass blown into a globe which is later flattened and spun to form a disk
   type of:

   glass

   a brittle transparent solid with irregular atomic structure