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| a substance that causes a chemical reaction without itself being affected |
| 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 |
alkalinity al·ka·lin·i·ty (āl'kə-lĭn'ĭ-tē)
n.
The alkali concentration or alkaline quality of a substance that contains alkali.