Having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red.
Containing a high percentage of silica; opposed to basic.
Of or relating to acid; having the character of an acid.
Favorably stimulating to the palate; pleasantly spicy; tangy.
Stimulating to the senses; engaging; charming.
Producing a burning sensation due to the presence of chilies or similar spices; spicy, hot.