What does "fused quartz" mean?

A type of glass consisting of almost pure silica in amorphous (noncrystalline) form.

What is a synonym for "fused quartz"?

Common synonyms include: quartz.

noun

noun ·Rare ·Advanced level

Noun

1
A type of glass consisting of almost pure silica in amorphous (noncrystalline) form. countable, uncountable