- Being sour or having the strength to neutralize alkalis, or turning a blue litmus paper red.
- (mineralogy) Containing a high percentage of silica; -- opposed to basic.
- Of or relating to acid; having the character of an acid, as an acidic solution.
- French: acide
- German: sauer, sí¤urehaltig
- Italian: acido
- Spanish: í¡cido
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