1. soil; softer part of the land, as distinct from rock.
2. metallic oxides in the form of unchangeable powder.
- diatomaceous e. — 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 e. — see diatomaceous earth (above).
- siliceous e. — see diatomaceous earth (above).




