unleaded

Etymology

un- +‎ leaded. The standard of identity comes from 40 CFR §79.32.

Pronunciation

• (UK) IPA^(key): /ˌʌnˈlɛd.əd/

• Audio (US)

  (file)

Adjective

unleaded (not comparable)

1. Without lead.
2. (US standard of identity, of gasoline) Containing no more than 0.05 grams of lead per gallon.

Verb

unleaded

1. past tense of unlead

Noun

unleaded (usually uncountable, plural unleadeds)

1. An unleaded fuel.
   • 1976, Newsweek (volume 87, page 292)

     Because one of the unleadeds just might turn out to be the right gasoline for your car. By right, I mean the one that gives you the best balance between price and performance.

   • 1984, Mechanix Illustrated (volume 80, page 18)

     Check the pumps and you'll see some economy unleadeds with octane (antiknock) ratings as low as 86; some quality unleadeds rate as high as 89.

2. (Australia, slang) Low-alcohol beer.