|Also called: kieselguhr an unconsolidated form of diatomite|
|See also diatomaceous earth a soft very fine-grained whitish rock consisting of the siliceous remains of diatoms deposited in the ocean or in ponds or lakes. It is used as an absorbent, filtering medium, insulator, filler, etc|
diatomaceous earth di·a·to·ma·ceous earth (dī'ə-tə-mā'shəs, dī-āt'ə-)
A powder made of the desiccated shells of diatoms, used as a filtering agent, adsorbent, and abrasive in many chemical operations.
|diatomite (dī-āt'ə-mīt') Pronunciation Key
A fine, light-colored, friable sedimentary rock consisting mainly of the silica-rich cell walls of diatoms. Diatomite forms both in lacustrine and marine environments. It is used in industry as a filler, filtering agent, absorbent, abrasive, and insulator.