| bentonite | <chemical> Bentonite. A native, colloidal, hydrated aluminum silicate which, on the addition of water, swells to produce a slippery paste. Its chief pharmaceutical use is as a suspending agent and it has also been used as a bulk laxative. Chemical name: Bentonite (12 Dec 1998) |
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| bentonite flocculation test | A flocculation test for rheumatoid arthritis in which sensitised bentonite particles are added to inactivated serum; the test is positive if half of the particles are clumped while the other half remain in suspension. (05 Mar 2000) |