English version

fuller's earth

From Longman Dictionary of Contemporary Englishfuller's earthful‧ler’s earth /ˌfʊləz ˈɜːθ $ -ərz ˈɜːrθ/ noun [uncountable]  DCBdried clay made into a powder that is used to clean cloth or oil
Examples from the Corpus
fuller's earthThe occurrence of fuller's earth in Cretaceous strata from Wiltshire to Yorkshire has been studied.
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