1. a small spherical crystalline body found in volcanic glass and some igneous rocks
Usage: geology

Examples

• The volcanic glass contained numerous spherulites visible under the microscope.
• Geologists identified spherulites in the obsidian sample from the recent eruption.
• The spherulites formed as the lava cooled rapidly, creating distinctive radial crystal patterns.
• Each spherulite displayed a characteristic radiating structure of tiny crystals.
• The presence of spherulites indicated that the rock had cooled quickly from a molten state.
• Researchers studied the spherulites to understand the cooling history of the volcanic material.