• WordNet 3.6
    • n bentonite an absorbent aluminum silicate clay formed from volcanic ash
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Century Dictionary and Cyclopedia
    • n bentonite A variety of clay occurring extensively in the Fort Benton strata of the Cretaceous of Wyoming. While containing chiefly silica, alumina, and water, with about 60 per cent or more of the first-named, it nevertheless has so many other bases as not to be refractory, but rather to resemble fullers' earth. Engin. and Min. Jour., Oct. 22, 1898, p. 491.
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In news:

Baker's Tiger-Sul Products subsidiary has purchased a new facility to produce sulphur bentonite fertilizer products.
Bentonite and kaolin (mattify and brighten).
The rescue begins as Rangers Richard Lynch, Robert Pogue, Calvin Chee, Marc Schlauch, (not pictured, anchoring) Mark Fye, Lyndsey Pruett and Shilene Tsosie put their all into pulling a likely scared and tired cow from the Bentonite clay.
Volcanic ash clay (also known as sodium bentonite clay) is created when volcanic ash mixes with water.

In science:

One may cite the work by Raynaud et al. , where banding is observed in a suspension of bentonite and the interface between the bands is in the velocityvorticity plane (gradient banding) : the system is sheared within a band at the inner moving cylinder, while the rest of the sample remains un-sheared.
A simple model for heterogeneous flows of yield stress fluids
Fig. 8). These structures are caused by the presence of bentonite in the sediments. Small channels exposed a cross-section through the stratigraphic sequence, so we imaged the ground through these diverse small channels and further up the geologic sequence.
The Cyborg Astrobiologist: Testing a Novelty-Detection Algorithm on Two Mobile Exploration Systems at Rivas Vaciamadrid in Spain and at the Mars Desert Research Station in Utah