'Astringent' has several different senses: 1: a drug that causes contraction of body tissues and canals; 2: sour or bitter in taste; 3: tending to draw together or constrict soft organic tissue
All legumes, including peanuts, beans, peas and lentils, have astringent qualities. So do many raw vegetables and fruits, especially those with bitter tastes. Examples include cranberries, pears,...