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ENGLISH · A WORD WITH POSSIBILITIES

alkaline.

Of, or relating to an alkali, one of a class of caustic bases.

8 characters3 syllables approx.English language

Meaning & usage

adj/ˈæl.kəl.aɪn/UK/ˈæl.kə.laɪn/US
  1. Of, or relating to an alkali, one of a class of caustic bases.

  2. Having a pH greater than 7.

Where this word comes from

First attested in 1677. From alkali + -ine, ultimately from Arabic اَلْقِلْي (al-qily, “alkali, ashes of the saltwort”), related to قَلَى (qalā, “to roast in a pan, fry”).

noun/ˈæl.kəl.aɪn/UK/ˈæl.kə.laɪn/US
  1. An alkaline battery.

Where this word comes from

First attested in 1677. From alkali + -ine, ultimately from Arabic اَلْقِلْي (al-qily, “alkali, ashes of the saltwort”), related to قَلَى (qalā, “to roast in a pan, fry”).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.