mesocrystalline
mesocrystalline
[‚mez·ə′krist·əl·ən] (petrology)
Of a crystalline rock, containing crystals whose diameters are intermediate between microcrystalline and macrocrystalline rock.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.