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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 of unleaded
1605-1615
1605-15; un-1 + lead2 + -ed3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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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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Word Value for unleaded

10
13
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