Word Study
Spherulite
CIDE DICTIONARY
Spherulite, n. [Cf. F. sphérulite.].
A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone. [1913 Webster]
OXFORD DICTIONARY
Spherulite, n. a vitreous globule as a constituent of volcanic rocks.
Derivative
spherulitic adj.
For further exploring for "Spherulite" in Webster Dictionary Online