A fine, powdered diatomaceous earth used in industry as a filler, a filtering agent, and absorbent, a clarifier, and an insulator. More commonly referred to as Diatomite.

n. A sedimentary mineral deposit formed from the skeletons of diatoms. It hasseveral industrial uses, for example in the manufacture of toothpaste andpolishes, and in filters for purifying liquids. Syn. diatomaceous earth, diatomite.

a light soil consisting of siliceous diatom remains and often used as a filtering material

Diatomaceous earth, a powder of microscopic fossils, used to filter beer.

Diatomaceous earth, a finely porous material used for thermal insulation to 1100°C (2012°F).