a chemical substance taken from the shells of sea creatures, that has various uses in industry, farming, and medicine, for example in medical dressings (= coverings for injured skin)

The bandage is made with chitosan, a blood-clotting agent found in shrimp shells. 这种绷带是用壳聚糖制成的，壳聚糖是一种在虾壳中发现的凝血剂。

Chitosan is used in winemaking, and has also been claimed to reduce fat absorption. 几丁聚糖用于酿酒，也被声称可以减少脂肪吸收。