pumice

noun

pum·​ice ˈpə-məs 

: a volcanic glass full of cavities and very low in density that is used especially in powder form for smoothing and polishing

pumiceous

pyü-ˈmi-shəs 

ˌpə-

adjective

Examples of pumice in a Sentence

Recent Examples on the Web

Use a loose, fast-draining potting mix that pairs nutritious soil with big pieces of orchid bark, pumice, or perlite. —Leanne Potts, Better Homes & Gardens, 20 Jan. 2026

To create a blend that mimics the tropical environment, Zhang recommends using equal parts coco coir, coco chips, perlite, and horticultural charcoal, with optional additions of pumice and worm castings. —Sj McShane, Martha Stewart, 18 Jan. 2026

Dryer skin can benefit from ingredients like coconut oil, shea butter, and glycerin, while activated charcoal and pumice are better suited for oily or acne-prone skin. —Olivia Rose Rushing, InStyle, 7 Jan. 2026

Use a cactus or succulent mix that is fast draining, or potting soil with pumice, sand, or perlite added. —Kim Toscano, Southern Living, 26 Dec. 2025

Word History

Etymology

Middle English pomis, from Anglo-French pomice, from Latin pumic-, pumex — more at foam

First Known Use

15th century, in the meaning defined above

Rhymes for pumice

• lummis
• squamous
• strumous

Kids Definition

pumice

noun

pum·​ice ˈpəm-əs 

: a very light glass that is formed by the rapid cooling of lava from volcanoes, is full of small holes, and is used especially in powder form for smoothing and polishing

Medical Definition

pumice

noun

pum·​ice ˈpəm-əs 

: a volcanic glass full of cavities and very light in weight used especially in powder form for smoothing and polishing