Muscovy glass

English

Noun

Muscovy glass (uncountable)

1. (historical) Muscovite, especially as used to make windows. [from 16th c.]
   • 1665, Robert Hooke, Micrographia:

     [It] may be perhaps very much concerned in the business of its hardening and tempering: of which somewhat is said in the Description of Muscovy-glass.