microcrystalline
mic·roc·rys·talline
adjective
1.
containing crystals that are visible only under a microscope
Origin
From micro- + crystalline.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.