Medical Definition of crystal
1: a body that is formed by the solidification of a chemical element, a compound, or a mixture and has a regularly repeating internal arrangement of its atoms and often external plane faces
2: ice 2; broadly : methamphetamine in any form when used illicitly
Learn More about crystal
Dictionary: Definition of "crystal" Thesaurus: All synonyms and antonyms for "crystal" Spanish Central: Translation of "crystal" Nglish: Translation of "crystal" for Spanish speakers Britannica English: Translation of "crystal" for Arabic speakers Britannica.com: Encyclopedia article about "crystal"
Seen and Heard
What made you want to look up crystal? Please tell us where you read or heard it (including the quote, if possible).