mesocrystalline

/M EH1 Z AH0 K ER0 IH1 S T AH0 L AY1 N/
adjective
  1. 1

    (geology, mineralogy) Having crystals intermediate in size between microcrystalline and macrocrystalline ones

  2. 2

    (biology, biomineralogy) Having a material structure composed of numerous small crystals of similar size and shape, which are arranged in a regular periodic pattern