“+ adjective
Etymology: International Scientific Vocabulary micr- + crystalline
: of or relating to crystallinity that is visible only under the microscope
was able to show that the halides are always microcrystalline — C.E.K.Mees
chalcedony … is a natural, microcrystalline fibrous silica — F.J.Pettijohn
• mi·cro·crystallinity “+ noun