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unleaded

[uhn-led-id] /ʌnˈlɛd ɪd/
adjective
1.
(of gasoline) containing no tetraethyllead; lead-free.
2.
Printing. not separated or spaced with leads, as lines of type or printed matter.
noun
3.
an unleaded product, especially gasoline that contains no tetraethyllead.
Origin
1605-1615
1605-15; un-1 + lead2 + -ed3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for unleaded
  • It is also used as an additive in unleaded gasoline.
  • Several countries have raised petrol taxes, and now tax leaded petrol far more heavily than unleaded fuel.
  • If hydrogen is introduced in phases, as unleaded petrol was, the industry should be able to cope.
  • Most cars today run perfectly well on regular unleaded gas.
  • Drive into almost any gas station these days and you find leaded and unleaded, regular and super, ethanol and methanol.
British Dictionary definitions for unleaded

unleaded

/ʌnˈlɛdɪd/
adjective
1.
(of petrol) containing a reduced amount of tetraethyl lead, in order to reduce environmental pollution
2.
not covered or weighted with lead
3.
(printing) (of lines of type, etc) not spaced or separated with leads; solid
noun
4.
petrol containing a reduced amount of tetraethyl lead
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unleaded
adj.

1610s, from un- (1) "not" + leaded (see lead (n.)). In reference to gasoline, from 1965.

Online Etymology Dictionary, © 2010 Douglas Harper
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10
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