Crystallite \Crys"tal*lite\ (kr?s"tal-l?t), n. [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.
[1913 Webster]