infusorial earth

/ ˌɪnfjʊˈzɔːrɪəl /

noun

Beds of white infusorial earth, resembling magnesia in appearance, known as Bergmehl, occur in Lapland and Finland.

"Frankoline," a mixture of cuprous and ferric chlorides dissolved in strong hydrochloric acid absorbed in infusorial earth.

Nobel, however, had discovered that when nitroglycerin was absorbed in infusorial earth, it was rendered much less sensitive.

For the final polishing, a little infusorial earth or even kaolin will do.

Then infusorial earth was added, to make the compound porous in texture.

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