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

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