1. resembling or containing pumice; having a light, porous, or frothy texture
Usage: geological; technical

Examples

• The pumiceous rock was so light it could float on water.
• Geologists identified the pumiceous deposits from the ancient volcanic eruption.
• The pumiceous texture of the stone made it useful for construction.
• Scientists studied the pumiceous material ejected during the volcanic blast.
• The pumiceous lava had cooled rapidly, creating countless air bubbles.
• Miners extracted the pumiceous stone for use in abrasive products.