FULLER'S EARTH
Meaning of FULLER'S EARTH in English
ful ‧ ler’s earth /ˌfʊləz ˈɜːθ $ -ərz ˈɜːrθ/ BrE AmE noun [uncountable]
dried clay made into a powder that is used to clean cloth or oil
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012