<chemical> Kieselguhr. A soft, bulky, solid material (88% silica) composed of skeletons of small prehistoric aquatic plants related to algae (diatoms). It can absorb 1.5-4 times its weight in water. ... Chemical name: Kieselguhr ... (12 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973
Kie'sel·guhr` noun [ G., from kiesel flint + guhr an earthy deposit or sediment in water.] Siliceous earth; specifically, porous infusorial earth, used as an absorbent of nitroglycerin in the manufacture of dynamite. Found on http://www.encyclo.co.uk/webster/K/8