Spherulite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Spherulite \Spher"u*lite\, n. [Cf. F. sph['e]rulite.] (Min.)
     A minute spherical crystalline body having a radiated
     structure, observed in some vitreous volcanic rocks, as
     obsidian and pearlstone.
     [1913 Webster]