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Definitions

alkali

[al-kuh-lahy] / ˈæl kəˌlaɪ /
NOUN
soluble base; opposite of an acid
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

These bacteria produce acid but are weak at generating alkali.

From Science Daily Jan. 9, 2026

Lynn Boulton, the Sierra Club’s local conservation chair, walked along a dirt road to what was once a marshy alkali meadow.

From Los Angeles Times Oct. 18, 2025

Another Los Angeles Times report on a roundup of immigrants begins by noting, “Human misery was compounded here today by a blistering desert sun and swirls of alkali dust.”

From Salon Sep. 21, 2024

A man suspected of an alkali attack in south London should not have been granted asylum, according to Home Office guidelines.

From BBC Feb. 2, 2024

The way to unlock the niacin in corn is to cook it with an alkali like lime.

From "The Omnivore's Dilemma" by Michael Pollan

Pots, pans, vats, machines exposed to corrosives will be protected by a skin of aluminum, metal highly resistant to mos.t acids and alkalies.

From Time Magazine Archive

Like all resins, these are insoluble in water, soluble in alkalies, but precipitated on neutralization of the alkaline solution.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" by Various

As the process of ripening becomes perfected, the acids combine with alkalies, and thus the acidity of the fruit diminishes, while its sweetness increases.

From American Pomology Apples by J. A. Warder

In 1800 Nicholson and Carlisle decomposed water by passing the electric current through the same; Ritter decomposed copper sulphate, and Davy decomposed the alkalies, potash and soda.

From Inventions in the Century by William Henry Doolittle

Humic, hū′mik, adj. denoting an acid formed by the action of alkalies on humus or mould.

From Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) by Various

In addition, the scientists substituted ammonium and tetramethyl ammonium, the former of which is mildly acidic, for the alkalis.

From Science Daily Feb. 12, 2024

Fermenting encompasses a range of processes through which microorganisms — yeasts, molds, bacteria — break down compounds in food to create alcohols, acids or alkalis, which in turn prevent the growth of harmful pathogens.

From Salon Dec. 6, 2023

Coal provided the power; the nascent chemical industry supplied the acids and alkalis essential to these enterprises.

From Nature Aug. 30, 2020

Alkalis were extracted from ashes, and soaps were prepared by combining these alkalis with fats.

From Textbooks Feb. 14, 2019

The results of this research, and his subsequent work on the alkalis and on muriatic acid and chlorine, have been already described.

From Heroes of Science Chemists by M. M. Pattison (Matthew Moncrieff Pattison) Muir




Vocabulary lists containing alkali


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