boric acid

bo·​ric acid | \ ˈbȯr-ik- How to pronounce boric acid (audio) \

Definition of boric acid

: a white crystalline acid B(OH)3 obtained from its salts and used especially as a weak antiseptic and fire-retardant

Examples of boric acid in a Sentence

Recent Examples on the Web There was not one patient 10 years ago that was using boric acid. Lisa Boone, Los Angeles Times, 10 June 2021 Mix one tablespoon of a peanut butter and honey mixture with ¼ teaspoon boric acid. Washington Post, 26 Apr. 2021 If that doesn't work, pour straight boric acid on the colony, or use an insecticide spray. Angela Watson,, 3 Apr. 2021 For example, many pest-control companies consider boric acid an alternative, natural insecticide. Washington Post, 8 Apr. 2021 But boric acid does have very low toxicity to humans and is safe if applied properly. Washington Post, 8 Apr. 2021 Detectives retrieved a bottle from her home on Jan. 14 which, according to the label, contained 100 percent boric acid for killing ants and roaches. NBC News, 18 Jan. 2021 Our returning top pick is a familiar brand name roach motel, while a traditional boric acid treatment and a gel formula round out the list. Michael Pollick,, 8 Aug. 2020 Basic traps, sticky pads, and boric acid treatments can cost less than $10. Michael Pollick,, 8 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'boric acid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of boric acid

1825, in the meaning defined above

History and Etymology for boric acid


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The first known use of boric acid was in 1825

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Dictionary Entries Near boric acid



Borgne, Lake

boric acid


boric oxide


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Last Updated

25 Jun 2021

Cite this Entry

“Boric acid.” Dictionary, Merriam-Webster, Accessed 25 Jun. 2021.

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More Definitions for boric acid

boric acid

bo·​ric acid | \ ˈbȯr-ik- \

Kids Definition of boric acid

: a weak acid containing boron used to kill germs

boric acid


Medical Definition of boric acid

: a white crystalline acid H3BO3 obtained from its salts and used especially as a weak antiseptic

called also boracic acid, orthoboric acid


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