ant·​ac·​id | \(ˌ)ant-ˈa-səd, ˈant-ˌa-\

Definition of antacid 

: an agent that counteracts or neutralizes acidity

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Other Words from antacid

antacid adjective

Examples of antacid in a Sentence

Recent Examples on the Web

The types of medications include hormonal birth control medications, blood pressure and heart medications, proton pump inhibitors, antacids and painkillers. Brett Molina, USA TODAY, "One-third of adults in U.S. taking drugs that may cause depression, study finds," 13 June 2018 And those medications could have nothing to do with mood or anxiety, such as medicine for blood pressure, antacids and painkillers. Editors, USA TODAY, "Are we headed for a California breakup?," 13 June 2018 Babies given antibiotics or antacids in infancy may be at increased risk for allergies in childhood. Nicholas Bakalar, New York Times, "Giving Babies Antibiotics or Antacids May Increase Allergy Risk," 2 Apr. 2018 Sign up for our daily newsletter and never miss our latest and greatest stories Science Astronauts aboard the International Space Station are using an ultra HD 4K camera to record experiments like this water bubble with an antacid inside. Wonbo Woo, WIRED, "This Bubble Artisan Might Blow Up, But She Won't Go Pop," 12 June 2018 But fans were still treated to compelling, strategic racing without having to watch through their fingers and reach for a bottle of antacids every 10 laps. Jim Ayello, Indianapolis Star, "Insider: IndyCar strikes balance between bonkers and boring at Texas," 10 June 2018 Nyland said that, in most cases, feeding babies smaller and more frequent meals and burping them often is preferable to giving them antacids. Alan Mozes,, "Babies given antacids, antibiotics may have higher risk for allergies, asthma," 3 Apr. 2018 Still, the team found that about 8 percent of the children in their analysis had been prescribed an antacid during their first six months of life. Alan Mozes,, "Babies given antacids, antibiotics may have higher risk for allergies, asthma," 3 Apr. 2018 Horizon also makes the two-in-one painkiller Duexis, which pairs painkiller ibuprofen with the antacid famotidine. Beth Mole, Ars Technica, "Drug maker hikes price of 2-in-1 painkiller >2,000%—$36 drugs now $3,000," 15 Feb. 2018

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.

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First Known Use of antacid

1715, in the meaning defined above

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Statistics for antacid

Last Updated

23 Oct 2018

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Time Traveler for antacid

The first known use of antacid was in 1715

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More Definitions for antacid



English Language Learners Definition of antacid

: medicine that prevents or lessens the pain caused by having too much acid in your stomach


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

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

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Comments on antacid

What made you want to look up antacid? Please tell us where you read or heard it (including the quote, if possible).


to clear from alleged fault or guilt

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