crystallite Meaning, Definition & Usage

noun any of numerous minute rudimentary crystalline bodies of unknown composition found in glassy igneous rock

See Crystal.

(Min.) A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc.