calcium hydroxide

noun

: a white crystalline strong alkali Ca(OH)₂ that is used especially to make mortar and plaster and to soften water

Examples of calcium hydroxide in a Sentence

Recent Examples on the Web

Venetian Plaster Often associated with Italian architecture, Venetian plaster is a lime plaster made from slaked lime (calcium hydroxide) and marble dust or marble chips. —Lauren Bengtson, Better Homes & Gardens, 15 May 2025

For example, some ingredients in toothpaste, such as calcium hydroxide or aluminum hydroxide, can reduce the effectiveness of mouthwash. —Heather Jones, Verywell Health, 5 Jan. 2025

Once the bleeding is under control, the area is covered with calcium hydroxide or MTA. —Laura Schober, Health, 1 Dec. 2024

Healthy pulp is covered with a protective material like calcium hydroxide or mineral trioxide aggregate (MTA). —Laura Schober, Health, 1 Dec. 2024

Finally, an electrochemical process is carried out to produce calcium hydroxide – a zero-carbon precursor for cement and lime production. —New Atlas, 15 Oct. 2024

Most replaced it with a milder chemical, calcium hydroxide. —Linda Villarosa Robin Miles Krish Seenivasan Alec K. Redfearn, New York Times, 13 June 2024

Ingredients like calcium hydroxide, calcium thioglycolate, sodium hydroxide, and sodium thioglycolate break down the keratin bonds that make up the structure of your hair. —Christine Giordano, womenshealthmag.com, 26 May 2023

The answer was portlandite, or calcium hydroxide. —IEEE Spectrum, 14 Mar. 2023

Word History

First Known Use

1872, in the meaning defined above

Rhymes for calcium hydroxide

• monoxide
• tetroxide

Kids Definition

calcium hydroxide

noun

: a white compound in the form of crystals that is used especially in making mortar and plaster and in softening water

Medical Definition

calcium hydroxide

noun

: a strong alkali Ca(OH)₂ commonly sold in water solution or as an ingredient of bleaching powder see limewater, soda lime