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English definition of “alkali”

alkali

noun [C or U]     /ˈæl.kəl.aɪ/ (plural alkalis) specialized
a substance that has the opposite effect or chemical behaviour to an acidTypes of chemicalSpecific chemicals, chemical compounds and gasesSubstances and structures in the body alkaline     /ˈæl.kəl.aɪn/ adjective Some plants will not grow in very alkaline soils.Types of chemicalSpecific chemicals, chemical compounds and gasesSubstances and structures in the body
(Definition of alkali noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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