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antacid

American  
[ant-as-id] / æntˈæs ɪd /

adjective

  1. preventing, neutralizing, or counteracting acidity, as of the stomach.

noun

  1. an antacid agent.

antacid British  
/ æntˈæsɪd /

noun

  1. a substance used to neutralize acidity, esp in the stomach

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. having the properties of this substance

    antacid tablets
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of antacid

First recorded in 1725–35; ant- + acid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

And 22% of those taking antacid supplements had severe headache, compared to 20% of those not taking antacids.

From Science Daily • Apr. 24, 2024

Send the man a case of antacid, he’s going to need it.

From Washington Times • Dec. 6, 2023

Topics of study include farming seaweed, fertilizing algae growth with iron, and adding antacid to increase the ocean’s ability to absorb carbon dioxide.

From Science Magazine • Sep. 13, 2023

A bottle of Tums antacid tablets rattled in the cup holder of Kirk Gilkey’s truck recently as he drove around the area surveying the rising water.

From Los Angeles Times • Apr. 24, 2023

Now she was chewing on the antacid tablets.

From "Middlesex: A Novel" by Jeffrey Eugenides

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.