antacid

noun

ant·​ac·​id (ˌ)ant-ˈa-səd 

ˈant-ˌa-

: an agent that counteracts or neutralizes acidity

antacid adjective

Examples of antacid in a Sentence

Recent Examples on the Web

Minimize using certain medications: Antibiotics, antacids, and nonsteroidal anti-inflammatory drugs (NSAIDs) can harm gut health, which increases inflammation. —Jillian Kubala, Health, 10 June 2025

Some of these common drugs include antacids, antidepressants, blood pressure medication, iron supplements, and opiates (narcotics). Polyps or tumors: A blockage in the intestine caused by a large growth (a polyp) or a tumor prevents stool from passing. —Amber J. Tresca, Verywell Health, 4 June 2025

Ivermectin has never been formulated or labeled specifically for over-the-counter use, like aspirin or an antacid. —Erika Edwards, NBC news, 9 June 2025

And he had been prescribed an antacid to prevent gastric ulcers. —Michael Ruiz , Julia Bonavita, FOXNews.com, 16 May 2025

Word History

First Known Use

1699, in the meaning defined above

Rhymes for antacid

• acid
• placid

Kids Definition

antacid

adjective

ant·​ac·​id (ˈ)ant-ˈas-əd 

: tending to prevent or neutralize acidity

antacid tablets

antacid noun

Medical Definition

antacid

1 of 2 adjective

ant·​ac·​id (ˈ)ant-ˈas-əd 

variants also antiacid

ˌant-ē-ˈas-əd, ˌan-ˌtī- 

: tending to counteract acidity

antacid

2 of 2 noun

variants also antiacid

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