English

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Alternative forms

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Etymology

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From sulphur +‎ -free.

Adjective

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sulphur-free (not comparable)

  1. (British spelling) Not containing any sulphur.
    • 2021 July 14, “Network News: Total Rail Solutions switches to HVO”, in RAIL, number 935, page 19:
      Bateman added: "In addition, HVO is sulphur-free, so it is less corrosive in our engines. [...]."