astringent

Short definition from Wiktionary

Noun

1. 1
   A substance which draws tissue together, thus restricting the flow of blood.

Adjective

1. 1
   Extremely sour, bitter.
2. 2
   Sharp, caustic, severe.
3. 3
   Causing a dry or puckering mouthfeel; characteristic of foods with high tannin content, such as certain kinds of berries and citrus fruits.
4. 4
   Having the effect of drawing tissue together; styptic.