from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small, usually spheroidal body consisting of radiating crystals, found in obsidian and other glassy lava rocks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone.
from the GNU version of the Collaborative International Dictionary of English
- n. A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone.
from The Century Dictionary and Cyclopedia
- n. A vitreous globule, such as those of which perlite is made up, having a more or loss perfectly developed concentric and at the same time decidedly radiating fibrous structure. The highly silicious volcanic rocks not unfrequently have a spherulitic structure.
- n. Same as radiolite, 2.
See sphere (Wiktionary)
Hydrodynamic processes, mechanically generated in such minuscule water and dust drops, form the shape of the artefact until it becomes a new atmospheric aerosol particle called iberulite with a vortex, quite similar to a micro spherulite.