蚕沙 meaning in Chinese

(家蚕的粪) silkworm excrement; dung of silkworms

My grandmother had a side pillow , the hand feeling is cool , when it was shaken it made pleasant sound , grandmother called it “ silk sandy pillow ” , when you has headache or feels dizzy , use it you will feel better , in fact , it is made of silkworm excrement
奶奶有个小枕头，用手摸着凉凉的，拿起来哗啦哗啦响，奶奶说叫“蚕沙枕” ，头疼脑热的，枕上它会感觉好许多，其实，它是蚕屎做的。