pumice
/ˈpʌmɪs/ · pum·i·ce
noun
- A light, porous type of pyroclastic igneous rock, formed during explosive volcanic eruptions when liquid lava is ejected into water or air as a froth containing masses of gas bubbles. The hikers used pumice stones to clean their hiking boots after a long trek.
- A type of abrasive material used for polishing or cleaning. She used pumice to remove the stubborn stains from her favorite shirt.
verb
- To abrade or roughen with pumice. The sandpaper pumiced the wood, creating a smooth surface.
Did you know? Pumice is so light that it can float on water, making it a unique and fascinating geological formation.