kieselguhr
/ˈkiːzəlgʊə(r)/noun
mass noun
- a form of diatomaceous earth used in various manufacturing and laboratory processes, chiefly as a filter, filler, or insulator硅藻土。
词源
late 19th cent.: from German, from Kiesel 'gravel' + dialect Guhr （literally 'yeast'） used to denote a loose earthy deposit, found in the cavities of rocks.