Meaning

noun a solid formed by the solidification of a chemical and having a highly regular atomic structure

noun a crystalline element used as a component in various electronic devices

noun a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces

originFrom Middle English crystal, cristal, criȝstall, representing a merger of Old English cristalla (from Latin crystallus) and Anglo-Norman cristall, Old French cristal (from Latin crystallum). The Latin is derived from Ancient Greek κρύσταλλος (krústallos, “clear ice”), from κρύος (krúos, “frost”), from Proto-Indo-European *krews- (“hard, hard outer surface, crust”).

Etymology from Wiktionary, CC BY-SA 3.0