Antacid

//ænˈtæsɪd// adj, noun

adj, noun ·Moderate ·College level

Definitions

Noun
  1. 1
    An agent that counteracts or neutralizes acidity, especially in the stomach.

    "Until Tagamet (cimetidine), most major drug companies didn't take tummy troubles terribly seriously. Oh sure, Americans gorped down antacids almost like candy, but most pharmaceutical big wigs probably wrote that off to our penchant for eating junk food on the run."

  2. 2
    an agent that counteracts or neutralizes acidity (especially in the stomach) wordnet
Adjective
  1. 1
    Counteracting or neutralizing acidity, especially in the stomach.
Adjective
  1. 1
    acting to neutralize acid (especially in the stomach) wordnet

Synonyms

All synonyms
counteractiveacidacidityagentalexipharmicalkali

Example

More examples

"If the heartburn continues, take an antacid."

Etymology

From anti- + acid.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.