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n. An absorbent aluminum silicate clay formed from volcanic ash and used in various adhesives, cements, and ceramic fillers.

n. Any of several impure clay minerals consisting mostly of montmorillonite.

n. A porous clay formed by the decomposition of volcanic ash that swells 5 to 6 times its original volume in the presence of water.

n. an absorbent aluminum silicate clay formed from volcanic ash.

n. A variety of clay occurring extensively in the Fort Benton strata of the Cretaceous of Wyoming.

n. an absorbent aluminum silicate clay formed from volcanic ash

"Bentonite is a primary montmorillonite clay mined in the U.S.A., but the term bentonite is often used for other commercial montmorillonite clays as well."

clay   

E558    anti-caking agent   

vermiculite    toxics    rock salt    kaolin    sepiolite    airgun    bef    selenite    slow-release    close-order