spherulite
n. மணிப்பரற் கூறு, பாறைவகைகளின் படிக உருளைக்கூறு.
Spher"u*lite, n. Etym: [Cf. F. sphérulite.] (Min.) Defn: A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone.