Standard Lemma guide

antacid

adj · noun · 4 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ænˈtæsɪd/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -æsɪd
  • CMU ARPABET: AE0 N T AE1 S AH0 D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Counteracting or neutralizing acidity, especially in the stomach.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

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

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective satellite

Meaning 3

acting to neutralize acid (especially in the stomach)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

an agent that counteracts or neutralizes acidity (especially in the stomach)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: gastric antacid, alkalizer, alkaliser, antiacid

Antonyms: none provided

Broader terms: agent

Narrower terms: cimetidine, Tagamet, ranitidine, Zantac, Alka-seltzer, Brioschi, Bromo-seltzer, Maalox, Mylanta, omeprazole, Prilosec, Pepto-bismal, Rolaids, Tums

History

Etymology

Etymology tree Proto-Indo-European *h2ent- Proto-Indo-European *-s Proto-Indo-European *h2énts Proto-Indo-European *-i Proto-Indo-European *h2énti Ancient Greek ᾰ̓ντῐ́ (ăntĭ́) Ancient Greek ἀντι- (anti-)der. English anti- Proto-Indo-European *h2eḱ- Proto-Indo-European *-éh1ti Proto-Indo-European *-yeti Proto-Indo-European *-éh1yeti Proto-Indo-European *h2eḱéh1yeti Proto-Italic *akēō Latin aceō Proto-Indo-European *dheh1-der. Proto-Italic *-iðos Latin -idus Latin acidusbor. French acidebor. English acid English antacid From anti- + acid.

Across languages

Translations

30 source translations are retained for this English entry.

  • Catalan: antiàcid — counteracting acidity
  • Catalan: antiàcida — counteracting acidity
  • Finnish: antasidinen — counteracting acidity
  • French: antiacide — counteracting acidity
  • Greek: αντιοξικός (antioxikós) — counteracting acidity
  • Hungarian: savlekötő — counteracting acidity
  • Hungarian: savcsökkentő — counteracting acidity
  • Korean: 제산제 (jesanje) — counteracting acidity
  • Portuguese: antiácido — counteracting acidity
  • Catalan: antiàcid — agent reducing acidity
  • Chinese Mandarin: 抑酸劑 /抑酸剂 (yìsuānjì) — agent reducing acidity
  • Czech: antacidum — agent reducing acidity
  • Finnish: antasidi — agent reducing acidity
  • French: antiacide — agent reducing acidity
  • Galician: antiácido — agent reducing acidity
  • German: Antazidum — agent reducing acidity
  • German: Säurehemmer — agent reducing acidity
  • Greek: αντιόξινο (antióxino) — agent reducing acidity
  • Hungarian: savlekötő — agent reducing acidity
  • Hungarian: savcsökkentő — agent reducing acidity
  • Indonesian: antasid — agent reducing acidity
  • Italian: antiacido — agent reducing acidity
  • Japanese: 制酸薬 (seisanyaku) — agent reducing acidity
  • Korean: 제산제 (jesanje) — agent reducing acidity
  • Māori: rongoā patu waikawa — agent reducing acidity
  • Portuguese: antiácido — agent reducing acidity
  • Romanian: antiacid — agent reducing acidity
  • Russian: антаци́д (antacíd) — agent reducing acidity
  • Spanish: antiácido — agent reducing acidity
  • Welsh: gwrthsur — agent reducing acidity