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cryptocrystalline Syllabification: cryp·to·crys·tal·line
Pronunciation: /ˌkriptōˈkristələn/ /ˌkriptōˈkristəˌlīn/ /ˌkriptōˈkristəˌlēn/

Definition of cryptocrystalline in English:

adjective

Having a crystalline structure visible only when magnified.
Example sentences
  • The textures of thunder eggs can vary from distinctly radiating fibrous textures to cryptocrystalline aggregates that preserve the structure of the original rhyolite.
  • Silica precipitated from aqueous solution at low temperatures gives cryptocrystalline varieties such as opal, jasper, chalcedony, agate, carnelian, onyx, flint, and chert.
  • In these, the spicular aspect grades abruptly inward into dense cryptocrystalline silica, which forms the bulk of the specimen.

Definition of cryptocrystalline in:

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