unleaded

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unleaded

The car requires unleaded gasoline.

Definition
  1. Adjective:
    • Not containing tetraethyl lead: Describes a type of fuel, especially gasoline/petrol, that does not have lead compounds added to it. This is the most common usage.
    • Not having leads between lines: A specific printing term referring to text set without extra spacing (lead strips) between lines of type. This usage is now rare.
Usage
  • The primary modern use of "unleaded" is as an adjective to describe fuel. It is most commonly used in the fixed phrase "unleaded gasoline" (or "unleaded petrol" in British English).
  • It is used in contrast to "leaded" fuel. For example, at a gas station, you might see pumps labeled "unleaded" or "regular unleaded."
Examples
  • Adjective:
    • Most modern cars are designed to run on unleaded fuel.
    • The mechanic confirmed that I should only use unleaded gasoline in my vehicle.
    • For environmental and health reasons, leaded gasoline has been largely replaced by unleaded.
Advanced Usage
  • "Unleaded" as a noun (informal): In casual conversation, "unleaded" can function as a shortened noun referring to unleaded gasoline.
    • "Fill it up with unleaded, please."
  • Metaphorical use: Rarely, it can be used metaphorically to describe something pure or unadulterated, though this is not standard.
    • His argument was an unleaded version of the truth. (This is a creative, non-standard usage.)
Variants and Related Words
  • Lead (verb/noun): The heavy metal whose compound, tetraethyl lead, was once a common fuel additive.
  • Leaded (adjective): Containing lead; specifically describing the old type of gasoline.
  • Premium Unleaded / Super Unleaded: Marketing terms for higher-octane grades of unleaded gasoline.
  • Unleaded coffee: An informal and humorous term for decaffeinated coffee, playing on the fuel analogy.
Synonyms
  • Lead-free: A more general synonym, especially for other products like paint or pipes.
  • Non-leaded: A less common variant with the same meaning.
Antonyms
  • Leaded: Specifically for fuel that contains tetraethyl lead.
Related Phrases/Idioms
  • "Regular unleaded": The standard, lowest-octane grade of unleaded gasoline available at most stations.
  • "Switch to unleaded": A common phrase from the late 20th century encouraging the use of unleaded fuel for environmental protection.
unleaded

The car requires unleaded gasoline.

Adjective
  1. not having leads between the lines
  2. not treated with lead
    • unleaded gasoline

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