- antacid, gastric antacid, alkalizer, alkaliser, antiacid - an agent that counteracts or neutralizes acidity (especially in the stomach)
--1 is a kind of agent
--1 has particulars:cimetidine, Tagamet; ranitidine, Zantac; Alka-seltzer; Brioschi; Bromo-seltzer; Maalox; Mylanta; omeprazole, Prilosec; Pepto-bismal; Rolaids; Tums