Containing acid or having the properties of an acid; having a sharp, sour taste or quality.
From Latin 'acidus' meaning 'sour.' The suffix '-ic' makes it an adjective. Acids were called such because of their sour taste, with the root traced to Indo-European words meaning 'sharp' or 'pointed.'
Your stomach produces one of the most powerfully acidic substances in nature—hydrochloric acid strong enough to dissolve metals—yet your stomach lining protects itself with a mucus layer that regenerates constantly.
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