antacid

(ant′asid)

adjective

that neutralizes acids; counteracting acidity

Origin: ant(i)- + acid

noun

an antacid substance, such as sodium bicarbonate

See antacid in American Heritage Dictionary 4

adjective
Counteracting or neutralizing acidity, especially of the stomach.
noun
A substance, such as magnesia or sodium bicarbonate, that neutralizes acid.

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