antiknock
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Related to antiknock: antiperspirant
an·ti·knock
(ăn′tĭ-nŏk′)n.
A substance, such as tetraethyl lead, added to gasoline to reduce engine knock.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
antiknock
(ˌæntɪˈnɒk)n
(Automotive Engineering) a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
an•ti•knock
(ˌæn tiˈnɒk, ˌæn taɪ-)adj.
of, pertaining to, or being a material added to fuel for an internal-combustion engine to eliminate or minimize knock.
[1920–25]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Noun | 1. | ![]() lead tetraethyl, tetraethyl lead - a clear oily poisonous liquid added to gasoline to prevent knocking chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight |
Adj. | 1. | antiknock - suppressing or eliminating engine knock in combustion engines; "antiknock properties"; "antiknock rating" leaded - treated or mixed with lead; "leaded gasoline"; "leaded zinc" |
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