High-Quality Transparent Glass
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1449, Puzzle 1 (Photocopier).
Question
High-Quality Transparent Glass
Answer
CRYSTAL
Word Meaning:
CRYSTAL — (countable) A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
Definitions from Wiktionary.