1. Plural of pumicite; fine-grained volcanic rock fragments or ash composed of pumice material, often used as an abrasive or in industrial applications.
Usage: technical; geology; materials science

Examples

• The quarry produces pumicites for use in polishing compounds.
• Pumicites are commonly employed in the manufacturing of lightweight concrete.
• Industrial abrasives often contain finely ground pumicites.
• The volcanic eruption deposited layers of pumicites across the region.
• Pumicites have applications in cosmetics and personal care products.