Definition of optic glass in English:

optic glass

noun

historical, archaic
  • A lens; an instrument having a lens; specifically a telescope.

Origin

Early 17th century; earliest use found in Thomas Walkington (c1575–1621), Church of England clergyman and author. From optic + glass.

Pronunciation

optic glass

/ˌɒptɪk ˈɡlas//ˌɒptɪk ˈɡlɑːs/