antacid

noun

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

Examples of antacid in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Others have had some luck with antacids and fiber supplements. — Melissa Rudy, FOXNews.com, 1 May 2026 And suddenly a sequence of songs that has been dealing with romantic ennui gets a knife-turn-in-the-gut twist that no amount of antacids will make feel better. — Chris Willman, Variety, 12 June 2026 From tucking antacids into the soil before planting to companion planting with marigolds, gardeners have lots of tips for helping tomato plants grow better. — Lauren Landers, The Spruce, 9 June 2026 There were plenty of reasons national Democrats were chugging antacids in recent months as one by one Mamdani’s past statements came back to Page One. — Philip Elliott, Time, 5 Nov. 2025 See All Example Sentences for antacid

Word History

First Known Use

1699, in the meaning defined above

Time Traveler
The first known use of antacid was in 1699

Rhymes for antacid

See All Rhymes for antacid

Browse Nearby Words

Antacea
antacid
Antaean
See all Nearby Words

Cite this Entry

“Antacid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antacid. Accessed 7 Jul. 2026.

Copy Citation

Kids Definition

antacid

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

Medical Definition

antacid

1 of 2 adjective
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)
: tending to counteract acidity

antacid

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

Nglish: Translation of antacid for Spanish Speakers

Britannica.com: Encyclopedia article about antacid

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