Adjective: microcrystalline ,mI-krow'kris-tu-lun or ,mI-krow'kris-tu,lIn [N. Amer], ,mI-krow'kris-tu,lIn [Brit]
- Containing crystals that are visible only under a microscope
"The microcrystalline structure of the rock was revealed under high magnification"
See also: crystalline
Encyclopedia: Microcrystalline