Definition of "alkalis" []

• Plural form of alkali. (noun)

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• "When Lavoisier presented his antiphlogistic system, this system proved in principle so perfect that one could confidently predict that many well-known substances, such as alkalis and alkaline earths, were not elements but oxides of hitherto unknown metals -"
• "There are two types of caustics: acids alkalis (also known as bases)"
• "Potentially serious exposures usually occur when strong alkalis or acids are used in an enclosed, poorly ventilated area for a prolonged period of time."