Definition of cryptocrystalline in English:
 cryptocrystalline
adjective ˌkrɪptəʊˈkrɪst(ə)lʌɪnˌkriptōˈkristəˌlīn
Having a crystalline structure visible only when magnified.
 non-porous cryptocrystalline limestone
 Example sentencesExamples
-  The textures of thunder eggs can vary from distinctly radiating fibrous textures to cryptocrystalline aggregates that preserve the structure of the original rhyolite.
 -  This cryptocrystalline silica can preserve with high fidelity delicate shell detail such as musculature.
 -  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 US English:
 cryptocrystalline
adjectiveˌkriptōˈkristəˌlīn
Having a crystalline structure visible only when magnified.
 nonporous cryptocrystalline limestone
 Example sentencesExamples
-  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.
 -  This cryptocrystalline silica can preserve with high fidelity delicate shell detail such as musculature.