kieselguhr

A silicious infusorial earth, used as an absorbent for nitroglycerin in the manufacture of dynamite: same as infusorial silica.

Siliceous earth; diatomaceous earth; specifically, porous infusorial earth, used as an absorbent of nitroglycerin in the manufacture of dynamite.

A kind of soft rock containing the remains of diatoms; it absorbs nitroglycerine and is used to manufacture dynamite.

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