- having a microscopic crystalline structure.
Origin of cryptocrystalline
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cryptocrystalline
Historical Examples of cryptocrystalline
That is, the metamorphic rocks are characteristically holocrystalline, while igneous rocks are porphyritic, or cryptocrystalline.North America
Israel C. Russell
- (of rocks) composed of crystals that can be distinguished individually only by the use of a polarizing microscope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- Having a microscopic crystalline structure, as the mineral chalcedony does.
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