unleaded gasoline

Definitions of unleaded gasoline
  1. noun
    gasoline that has not been treated with a lead compound
    synonyms: unleaded petrol
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    antonyms:
    leaded gasoline
    gasoline treated with a lead compound to reduce motor knocks
    type of:
    gas, gasolene, gasoline, petrol
    a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
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