acerb, acerbic, astringent
Meaning: sour or bitter in taste
meaning of the word
astringent, astringent_drug, styptic
Meaning: a drug that causes contraction of body tissues and canals
Tea, when chemically analyzed, is found to contain woody fibre, mucilage, a considerable quantity of the astringent principle, or tannin, a narcotic principle, which is, perhaps, connected with a peculiar aroma.