First Known Use: 15th century
Dictionary
fuller's earth
noun
Definition of FULLER'S EARTH
: an earthy substance that consists chiefly of clay mineral but lacks plasticity and that is used as an adsorbent, a filter medium, and a carrier for catalysts
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Origin of FULLER'S EARTH
1fuller; from its earlier use as fulling agent
Rhymes with FULLER'S EARTH
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