透明质酸/ 透明質酸 tòumíngzhìsuān (also tòumíngzhísuān) hyaluronic acid
A type of polysaccharide capable of holding over 500 times its weight in water, widely used for wound healing, joint injections, and skin fillers; also known as 玻尿酸 bōniàosuān or 玻糖醛酸 bōtángquánsuān