OPTICAL GLASS

Pronunciation (US): (GB):

Meaning:

Clear homogeneous glass of known refractive index; used to make lenses

Classified under:

Nouns denoting substances

Hypernyms ("optical glass" is a kind of...):

glass (a brittle transparent solid with irregular atomic structure)

Hyponyms (each of the following is a kind of "optical glass"):

crown glass; optical crown; optical crown glass (optical glass of low dispersion and low refractive index)

flint glass; optical flint (optical glass of high dispersion and high refractive index)