Definition of crystalline adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈkrɪstəlaɪn//
    ; NAmE NAmE//ˈkrɪstəlaɪn//
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  1. 1(specialist) made of or similar to crystals crystalline structure/rocks
  2. 2(formal) very clear synonym transparent water of crystalline purity
  3. Word OriginMiddle English: from Old French cristallin, via Latin from Greek krustallinos, from krustallos ‘ice, crystal’.
See the Oxford Advanced American Dictionary entry: crystalline