Definition of cryptocrystalline in English:

cryptocrystalline

Syllabification: cryp·to·crys·tal·line
Pronunciation: /ˌkriptōˈkristəˌlin, -ˌlīn, -ˌlēn
 
/

adjective

  • Having a crystalline structure visible only when magnified.
    More 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.

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