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antiknock (chemistry)

Definition:

any of various compounds that are added to gasoline to reduce engine knocking

Class:

substance noun (substance and materials)

Plural:

antiknocks

Original source:

Princeton WordNet

Etymology:

anti- + knock
(Source: Wiktionary)  [more]

All senses of antiknock...

Definition references  (+images)

Collins Dictionary:

antiknock

a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine (15 of 277 words, 1 usage example, pronunciation)

www​.collinsdictionary​.com​/dictionary​/english​/antiknock

Cambridge Dictionary:

antiknock | antiknocking [adjective, derived]

a chemical which is added to the fuel of a car engine in order to make the fuel burn more effectively (21 of 32 words, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/antiknock

Wiktionary:

antiknock | antiknocks [plural] | anti-knock [sense-specific]

of an additive added to petroleum/gasoline to reduce the occurrence of engine knock. | Such a substance, usually tetraethyl lead (also MMT, MTBE and ethanol) (24 of 26 words, 2 definitions)

en​.wiktionary​.org​/wiki​/antiknock

Random House Dictionary:

antiknock

noting or pertaining to any material added to fuel for an internal-combustion engine to eliminate or minimize knock. (18 of 24 words, pronunciation)

dictionary​.infoplease​.com​/antiknock

New World Dictionary:

antiknock [United States]

a substance added to the fuel of internal-combustion engines to reduce or eliminate explosive noise resulting from too rapid combustion (20 of 22 words)

www​.yourdictionary​.com​/antiknock

Oxford Dictionary:

antiknock

Syllabification: (an·ti·knock) | a substance (such as tetraethyl lead) added to gasoline to inhibit preignition. (14 of 19 words, 2 definitions, pronunciation)

oxforddictionaries​.com​/definition​/american english​/antiknock

American Heritage Dictionary:

antiknock

A substance, such as tetraethyl lead, added to gasoline to reduce engine knock. (13 of 14 words)

www​.yourdictionary​.com​/antiknock

Britannica Encyclopedia:

chemical compound | O2 [chemical formula] | CO2 [chemical formula] | CCl4 [chemical formula]

any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the ... (25 of 1746 words, 19 images)

www​.britannica​.com​/E​Bchecked​/topic​/108614​/chemical-compound

Wikipedia:

Chemical compound

a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. Chemical compounds have a unique and defined chemical structure; they consist of a fixed ratio of atoms... (39 of 1309 words, 1 image)

en​.wikipedia​.org​/wiki​/Chemical compound

Merriam-Webster:

compound [entry 1, verb] | compd [abbreviation] | cpd [abbreviation] | combine [synonym, sense-specific] | augment [synonym, sense-specific] | accelerate [synonym, sense-specific] | add [synonym, sense-specific] | aggrandize [synonym, sense-specific] | amplify [synonym, sense-specific] | ...

to put together (parts) so as to form a whole; "combine" | to form by combining parts | to settle amicably; adjust by agreement ; to agree for a ... (27 of 266 words, 6 definitions, 5 usage examples, pronunciations)

www​.merriam-webster​.com​/dictionary​/compound

compound [entry 2, adjective] | amalgamated [synonym, sense-specific] | composite [synonym, sense-specific] | noncompound [antonym, sense-specific] | simple [antonym, sense-specific] | blended [similar, sense-specific] | combined [similar, sense-specific] | commingled [similar, sense-specific] | mingled [similar, sense-specific] | ...

composed of or resulting from union of separate elements, ingredients, or ... | involving or used in a combination | [words] constituting a compound ; ... (23 of 150 words, 3 definitions, 2 usage examples, pronunciation)

www​.merriam-webster​.com​/dictionary​/compound show=1

compound [entry 3, noun]

a word consisting of components that are words (as rowboat, high school, ... | something formed by a union of elements or parts ; especially, a ... (25 of 75 words, 2 definitions, pronunciation)

www​.merriam-webster​.com​/dictionary​/compound show=2

compound [entry 4, noun]

a fenced or walled-in area containing a group of buildings and especially residences (13 of 34 words, pronunciation)

www​.merriam-webster​.com​/dictionary​/compound show=3

Macmillan British Dictionary:

compound | compounds [plural]

[countable, chemistry] a chemical substance that consists of two or more ... | [countable] a combination of things | [countable] an enclosed area ... (21 of 168 words, 4 definitions, 4 usage examples, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/compound

compound [transitive, verb] | compounded [past tense] | compounding [present participle] | compounds [3rd-person singular present] | be compounded of something

to make a problem or difficult situation worse | to mix two or more substances together in order to make a new substance or product | "be compounded ... (26 of 83 words, 3 definitions, 2 usage examples, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/compound 13

compound [only before noun, adjective]

made up of two or more parts | [linguistics] a compound noun, adjective, or verb is a combination of two or more words (22 of 49 words, 2 definitions, 1 usage example, pronunciation)

www​.macmillandictionary​.com​/dictionary​/british​/compound 20

Columbia Encyclopedia:

compound | H2[chemical formula]

in chemistry, a substance composed of atoms of two or more elements in chemical combination, occurring in a fixed, definite proportion and arranged in ... (24 of 93 words)

www​.infoplease​.com​/ce​6​/sci​/A​0813112​.html

Encarta Dictionary:

antiknock

a substance added to gasoline. Use: to reduce or stop faulty fuel combustion associated with a knocking sound. (18 of 30 words, pronunciation)

encarta​.msn​.com​/dictionary 1861585989​/definition​.html  [offline]

Etymology reference

Wiktionary:

antiknock | antiknocks [plural]

Origin: anti- + knock

en​.wiktionary​.org​/wiki​/antiknock

anti-

Origin: Ancient Greek ἀντί (anti, "against").

en​.wiktionary​.org​/wiki​/anti-

knock | knocks [plural] | knocked [past tense] | knocking [present participle]

Origin: Akin to Old Norse knoka (compare Swedish knocka, Danish knuge, to hug) and Middle High German knochen, to hit.

en​.wiktionary​.org​/wiki​/knock

Audio references

Collins Dictionary:

antiknock

Audio: British English pronunciation of "antiknock"

www​.collinsdictionary​.com​/dictionary​/english​/antiknock

Cambridge Dictionary:

antiknock

Audio 1: British English pronunuciation of "antiknock"

Audio 2: North American English pronunuciation of "antiknock"

dictionary​.cambridge​.org​/dictionary​/british​/antiknock

the Free Dictionary:

antiknock

Audio 1: North American English pronunciation of "antiknock"

Audio 2: British English pronunciation of "antiknock"

Audio 3: North American English pronunciation of "antiknock" by speech synthesizer

www​.thefreedictionary​.com​/antiknock

Google Dictionary:

antiknock

Audio: English pronunciation of "antiknock"

www​.google​.com​/#hl=en&tbs=dfn​:1&fp=1&q=antiknock

YourDictionary Audio:

antiknock

Audio: North American English pronunciation of "antiknock"

www​.yourdictionary​.com​/antiknock

Page last updated: 2013-06-26

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