alkaline

[al-kuh-lahyn, -lin]

adjective

Chemistry.

1. of or like an alkali.

2. containing an alkali.

3. having the properties of an alkali.

4. having a pH value greater than 7.

alkaline

/ ˈælkəˌlaɪn /

adjective

1. having the properties of or containing an alkali

alkaline

1. Capable of neutralizing an acid. Bases are alkaline.

2. Relating to an alkali compound.

3. Having a pH greater than 7.

4. Having a relatively low concentration of hydrogen ions.

Word History and Origins

Origin of alkaline¹

First recorded in 1670–80; alkal(i) + -ine ¹

Example Sentences

The site's pH of 12 makes it one of the most alkaline environments ever documented, creating conditions that are exceptionally difficult for life to endure.

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Darkness clings to the sky as thousands of bikers zoom across a dusty alkaline flat in search of a sunrise set, hoping to outpace the gash of periwinkle light bleeding over the horizon.

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White bones of fallen equines rest in the alkaline meadows.

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The process uses hot water mixed with an alkaline lye solution, so it’s more environmentally friendly than standard cremation, and usually more expensive.

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He said that the DMK alkaline washes have been so effective that his scars have softened in his arm and nearly faded on his chest.

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Related Words

• salty 
• soluble