lead-free

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Thân thiện

Lead-free gasoline is used in most modern cars.

Definition

Adjective:
- Not containing lead: Describes a substance, material, or product from which the toxic, heavy metal lead has been removed or was never included in its composition.

Usage

The adjective "lead-free" is used attributively (before a noun) to specify that the noun it modifies does not contain lead.
It is commonly used in contexts related to public health, environmental safety, construction, plumbing, electronics, and consumer goods.

Examples

Adjective:
- Many countries have mandated the use of lead-free solder in electronics manufacturing.
- We replaced the old pipes with lead-free alternatives to ensure safe drinking water.
- This brand of paint is certified lead-free.

Advanced Usage

"To be lead-free": Used predicatively (after a linking verb like 'is' or 'was') to state the property of not containing lead.
- The new housing development's plumbing is completely lead-free.
In regulatory and technical contexts, "lead-free" often has specific legal definitions regarding maximum permissible lead content (e.g., "lead-free" brass must contain less than 0.25% lead).

Variants and Related Words

Non-lead (adj): An alternative term with a similar meaning, often used in technical specifications.
- The contractor specified non-lead flashing for the roof.
Unleaded (adj): Specifically used for gasoline that does not contain tetraethyl lead. (This is the term referenced in the provided context).
- Please fill the tank with unleaded fuel.

Synonyms

Notes

The provided reference context specifically defines "lead-free" for gasoline, using the more precise industry term "unleaded". In broader modern usage, "lead-free" applies to many other materials like paint, plumbing fixtures, ceramics, and toys.
The hyphen is typically used when the term functions as a compound adjective before a noun (e.g., lead-free paint). It may be omitted in predicative use or informal writing, but retention is standard for clarity.

Lead-free gasoline is used in most modern cars.

Adjective

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