Hypertext Webster Gateway: "microcrystalline"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Microcrystalline \Mi`cro*crys"tal*line\, a. [Micro- +
crystalline.] (Crystallog.)
Crystalline on a fine, or microscopic, scale; consisting of
fine crystals; as, the ground mass of certain porphyrics is
microcrystalline.
From WordNet (r) 1.7 (wn)
microcrystalline
adj : containing crystals that are visible only under a microscope
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