'Microcrystalline' definitions:

Definition of 'microcrystalline'

adjective

Containing crystals that are visible only under a microscope

Definition of 'Microcrystalline'

From: GCIDE

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. [1913 Webster]

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