| any of a number of polymers containing alternate silicon and oxygen atoms and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent |
| a neutral crystalline substance, C2H7NO3S, obtained from bile |
precipitant pre·cip·i·tant (prĭ-sĭp'ĭ-tənt)
n.
A substance that causes a precipitate to form when it is added to a solution.