fuller's earth

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  • IPA(key): /ˌfʊləz ˈɜːθ/


fuller's earth (uncountable)

  1. A fine clay used in fulling cloth.
    • 1785 October 17, The Times, page 3 col. D:
      On Lord Sunderland's estate, in the county of Westmeath, there is a fine strata of fuller’s earth, a commodity of which our woollen manufacturers stand much in need: yet this bed lies unnoticed to all, except the peasantry on the soil.
    • 1892, Arthur Conan Doyle, The Adventure of the Engineer's Thumb[1]:
      You are probably aware that fuller’s earth is a valuable product, and that it is only found in one or two places in England?