diatomaceous earth

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di·a·to·ma·ceous earth

a powder made of desiccated diatom material; used as a filtering agent, adsorbent, and abrasive in many chemical operations.

di·a·to·ma·ceous earth

(dī'ă-tŏ-mā'shē-ŭs ĕrth)
A powder made of desiccated diatom material; used as a filtering agent, adsorbent, and abrasive in many chemical operations.

diatomaceous earth

Silica containing fossilized shells of microscopic algae with a siliceous or calcium-containing cell wall. It is used in insulating material and filters and as an absorbent. Synonym: diatomite

earth

1. soil; softer part of the land, as distinct from rock.
2. metallic oxides in the form of unchangeable powder.

diatomaceous earth
a fine white powder composed of the siliceous skeletons of diatoms; used in treating diarrhea and as a feed additive. Called also infusorial earth, purified siliceous earth.
infusorial earth
see diatomaceous earth (above).
siliceous earth
see diatomaceous earth (above).