antacid

English Wikipedia has an article on:

antacid

Wikipedia

From anti- +‎ acid.

• IPA^(key): /ænˈtæsɪd/
• Rhymes: -æsɪd

antacid (plural antacids)

1. An agent that counteracts or neutralizes acidity, especially in the stomach. [from 18th c.]
   • 1985, Joe Graedon, Teresa Graedon, The New People's Pharmacy: Drug Breakthroughs for the '80s, Bantam, →ISBN, page 134:

     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.

   • 1993, “Pennyroyal Tea”, in In Utero, performed by Nirvana:

     I'm on warm milk and laxatives
     Cherry-flavored antacids

antacid (comparative more antacid, superlative most antacid)

1. Counteracting or neutralizing acidity, especially in the stomach. [from 18th c.]