Of or relating to acid; having the character of an acid.
Containing a high percentage of silica; opposed to basic.
Having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red.
Having a strong odor that stings the nose, said especially of acidic or spicy substances.
Stinging; acerbic.
Having a sharp and stiff point.
Having a strong taste that stings the tongue, said especially of hot (spicy) food, which has a strong and sharp or bitter taste.