ant·​ac·​id (ˌ)ant-ˈa-səd How to pronounce antacid (audio)
: an agent that counteracts or neutralizes acidity
antacid adjective

Examples of antacid in a Sentence

Recent Examples on the Web Overall, antacids tend to be safe for most patients. Sarah Bradley, Verywell Health, 28 July 2022 Research has shown that supplemental intake from antacids (providing more than 5,000 mg of magnesium/day) could lead to toxicity. Casey Seiden, Parents, 24 Feb. 2024 In fact, magnesium carbonate is a common ingredient alongside calcium in antacid supplements to help calm stomach acid and alleviate heartburn. Casey Seiden, Parents, 24 Feb. 2024 Lifestyle and diet changes and antacids can ease symptoms. Mark Gurarie, Health, 15 Feb. 2024 Don’t forget antacids and over-the-counter medicines to ease digestion. Kelsey Glennon, Travel + Leisure, 5 Feb. 2024 If someone does end up overeating, people can reach for over-the-counter antacids to help with bloating or reflux, Kim recommended. Julia Landwehr, Health, 23 Nov. 2023 Medications that can be used to treat the symptoms of LPR include antacids, proton pump inhibitors (PPIs), and H2 blockers, Osborne explained. Maggie O'Neill, Health, 16 Nov. 2023 She was advised to drink water, as well as take antacids, antihistamines and aspirin, and only a dental assistant was present at the time of her death, according to the suit. Kelly Kasulis Cho, Washington Post, 9 Nov. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'antacid.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1715, in the meaning defined above

Time Traveler
The first known use of antacid was in 1715

Dictionary Entries Near antacid

Cite this Entry

“Antacid.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2024.

Kids Definition


ant·​ac·​id (ˈ)ant-ˈas-əd How to pronounce antacid (audio)
: tending to prevent or neutralize acidity
antacid tablets
antacid noun

Medical Definition


1 of 2 adjective
ant·​ac·​id (ˈ)ant-ˈas-əd How to pronounce antacid (audio)
variants also antiacid
: tending to counteract acidity


2 of 2 noun
variants also antiacid
: an agent (as an alkali or absorbent) that counteracts or neutralizes acidity

More from Merriam-Webster on antacid

Last Updated: - Updated example sentences
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