ant·​ac·​id | \ (ˌ)ant-ˈa-səd How to pronounce antacid (audio) , ˈant-ˌa- \

Definition of antacid

: an agent that counteracts or neutralizes acidity

Other Words from antacid

antacid adjective

Examples of antacid in a Sentence

Recent Examples on the Web The seaweed will gobble up carbon from the air and water, and the limestone will serve as an antacid for the surface layer of the sea -- like a Tums for the ocean. Bill Weir, CNN, 22 May 2022 Baking soda is an antacid and counteracts stomach acid. Dr. Keith Roach, oregonlive, 20 Apr. 2022 Since the late 1960s barrels of ink and antacid have been spilled on the discussions, hand-wringing and gnashing of teeth over what is the best form of government for Carroll County. Kevin Dayhoff,, 13 Nov. 2020 According to Trump’s medical team, the president is currently taking Vitamin D, zinc, and famotidine (an antacid typically used for heartburn and known by its brand name Pepcid). Claire Maldarelli, Popular Science, 5 Oct. 2020 Since the beginning of time, barrels of ink and antacid have been spilled on the discussions, hand-wringing and gnashing of teeth over what form of government is best suited for Carroll County. Kevin Dayhoff,, 18 Sep. 2020 At the medical relief tents, the number-one priority was no longer dousing people with milk and antacid to counter the effect of smoke bombs and pepper balls. Ashraf Khalil, The Christian Science Monitor, 9 June 2020 Protesters and street medics have used what's called a LAW solution, which is a mixture of 50 percent unflavored liquid antacid and 50 percent water. Louryn Strampe, Wired, 2 June 2020 These include antivirals for influenza, arthritis drugs, estrogen patches and even antacids. Liz Szabo, azcentral, 15 May 2020 See More

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

First Known Use of antacid

1715, in the meaning defined above

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Time Traveler for antacid

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The first known use of antacid was in 1715

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Last Updated

3 Jun 2022

Cite this Entry

“Antacid.” Dictionary, Merriam-Webster, Accessed 26 Jun. 2022.

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More Definitions for antacid


ant·​ac·​id | \ (ˈ)ant-ˈas-əd How to pronounce antacid (audio) \
variants: also antiacid \ ˌant-​ē-​ˈas-​əd, ˌan-​ˌtī-​ How to pronounce antacid (audio) \

Medical Definition of antacid

 (Entry 1 of 2)

: tending to counteract acidity


variants: also antiacid

Medical Definition of antacid (Entry 2 of 2)

: an agent (as an alkali or absorbent) that counteracts or neutralizes acidity

More from Merriam-Webster on antacid

Nglish: Translation of antacid for Spanish Speakers

Britannica English: Translation of antacid for Arabic Speakers Encyclopedia article about antacid


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