guhr
noun
ˈgu̇(ə)r
plural -s
1
: a loose earthy deposit from water occurring in the cavities of rocks, being mostly white but sometimes red or yellow, and consisting of a varying mixture of clay or ocher
2
[by shortening] : kieselguhr
Word History
Etymology
German guhr, gur; akin to Middle High German gern to ferment, Old High German jesan