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 Powders often contain boric acid dust which is less toxic to mammals than most synthetic insecticides. Dan Diclerico, Good Housekeeping, 22 July 2022 Note that boric acid, like many pesticides, can be toxic if swallowed; in fact, in 2020, pesticides caused nearly 70,000 poisonings in the U.S., according to the National Poison Control Center. Rebecca Straus, Good Housekeeping, 16 May 2022 Control ants with sticky Tree Tanglefoot Insect Barrier or traps containing boric acid. Deanna Kizis, Sunset Magazine, 31 Mar. 2022 A few years later, her dalliance with a member of the Weather Underground led to an arrest for possession of a suspicious substance that was actually just boric acid, for the removal of a foreign object from her eye. Nick Paumgarten, The New Yorker, 21 Feb. 2022 Mix equal parts boric acid powder and one of the following: flour, cornmeal or sugar. Washington Post, 16 Nov. 2021 Try this dry powder combination: Mix equal parts of boric acid and flour or cornmeal, and some sugar. Washington Post, 21 July 2021 And dietary supplements have been found to contain boric acid, floor wax, and rat poison. Matthew Hongoltz-hetling, The New Republic, 23 June 2021 Bait traps typically contain boric acid or a similar ingredient that’s toxic to ants but won’t kill them right away. Angela Watson,, 3 Apr. 2021 See More

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.

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


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Last Updated

31 Jul 2022

Cite this Entry

“Boric acid.” Dictionary, Merriam-Webster, Accessed 8 Aug. 2022.

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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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