Read Edit View history 膨土岩 péngtǔyán bentonite Origin Definitions Defs Strokes Stroke Words Sentences Sents 膨土岩 péngtǔyán bentonite A type of soft, light-colored clay rock formed from volcanic ash; it absorbs water and expands significantly in volume.
膨土岩 péngtǔyán bentonite A type of soft, light-colored clay rock formed from volcanic ash; it absorbs water and expands significantly in volume.