Medical Dictionary

antacid ant·ac·id (ānt-ās'ĭd) or an·ti·ac·id (ān'tē-ās'ĭd, ān'tī-)
Counteracting or neutralizing acidity, especially of the stomach. n.
A substance, such as sodium bicarbonate, that neutralizes acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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