acidic

adjective

• 1having the properties of an acid, or containing acid; having a pH below 7: a cocktail of acidic pollutantsOften contrasted with alkaline and basic.

• 2sharp-tasting or sour:acidic wine
• (of a person’s remarks or tone) bitter or cutting:the occasional acidic comment
• (of a colour) strikingly intense or bright:an acidic yellow

• 3 Geology (of rock, especially lava) relatively rich in silica: acidic granite batholiths
• Metallurgy relating to or denoting steel-making processes involving silica-rich refractories and slags: acidic slag