Main Entry: crys·tal·line

Pronunciation: \ˈkris-tə-lən also -ˌlīn, -ˌlēn\

Function: adjective

Etymology: Middle English cristallin, from Anglo-French & Latin; Anglo-French, from Latin crystallinus, from Greek krystallinos, from krystallos

Date: 15th century

1 : resembling crystal: as a : strikingly clear or sparkling <crystalline air> <a crystalline lake> b : clear-cut
2 : made of crystal : composed of crystals
3 : constituting or relating to a crystal

— crys·tal·lin·i·ty \ˌkris-tə-ˈli-nə-tē\ noun