Как по Английски будет 경석

noun

A very light and porous volcanic rock formed when a gas-rich froth of glassy lava solidifies rapidly.

Примеры использования:

Coarser fractions additionally contain volcanic clasts of vesicular and porphyritic lava, tuff and …

verb

Rub with pumice to smooth or clean.

Примеры использования:

By ignoring that, you come up with something prettied up, pumiced, and packaged.

noun

A volcanic ash with a composition similar to pumice but deposited as powder or granules, widely used in the manufacture of lightweight concrete and for its abrasive properties; unconsolidated volcanic ash.

noun

A volcanic ash with a composition similar to pumice but deposited as powder or granules, widely used in the manufacture of lightweight concrete and for its abrasive properties; unconsolidated volcanic ash.