anti-knockadj.n.

Brit.

/ˌantɪˈnɒk/, U.S.

/ˌæn(t)iˈnɑk/,

/ˌænˌtaɪˈnɑk/,

/ˌæn(t)əˈnɑk/

Origin: Formed within English, by derivation. Etymons: anti- prefix, knock n.¹

Etymology: < anti- prefix + knock n.¹

A. adj.

Designating a fuel, fuel additive, piece of technology, etc., in an internal combustion engine, designed to reduce or prevent premature combustion (see knock n.¹ 1c). Also: of or relating to such reduction or prevention of engine knock.

ΚΠ

1921 Flight 16 June 412/2 Benzole and similar anti-knock fuels are, however, permitted.

1937 Life 10 May (verso front cover) (advt.) More anti-knock fluid (containing lead tetraethyl) at pumps marked ‘Ethyl’ than you get in the best regular-grade gasoline.

1989 Green Mag. Dec. 73/1 Lead gets its anti-knock effect by slowing combustion, leading to higher levels of unburned hydrocarbon emissions.

2019 mirror.co.uk (Nexis) 5 Jan. Rather remarkably, the fuel consumption is down by 4%, and anti-knock tech hidden in there somewhere means you can almost run it on used cooking oil.

B. n.

A substance added to an internal combustion engine's fuel, designed to reduce or prevent premature combustion.

ΚΠ

1925 Proc. Conf. Tetraethyl Lead Gasoline (U.S. Public Health Bull. No. 158) 8 We tried one of the selenium metallo-organic compounds. We found that was an antiknock.

2013 News Jrnl. (Wilmington, Delaware) 5 June The manufacture of tetrathyl lead antiknocks.

This entry has been updated (OED Third Edition, March 2022).

单词	anti-knock
释义	anti-knockadj.n. Brit. /ˌantɪˈnɒk/, U.S. /ˌæn(t)iˈnɑk/, /ˌænˌtaɪˈnɑk/, /ˌæn(t)əˈnɑk/ Origin: Formed within English, by derivation. Etymons: anti- prefix, knock n.¹ Etymology: < anti- prefix + knock n.¹ A. adj. Designating a fuel, fuel additive, piece of technology, etc., in an internal combustion engine, designed to reduce or prevent premature combustion (see knock n.¹ 1c). Also: of or relating to such reduction or prevention of engine knock. ΚΠ 1921 Flight 16 June 412/2 Benzole and similar anti-knock fuels are, however, permitted. 1937 Life 10 May (verso front cover) (advt.) More anti-knock fluid (containing lead tetraethyl) at pumps marked ‘Ethyl’ than you get in the best regular-grade gasoline. 1989 Green Mag. Dec. 73/1 Lead gets its anti-knock effect by slowing combustion, leading to higher levels of unburned hydrocarbon emissions. 2019 mirror.co.uk (Nexis) 5 Jan. Rather remarkably, the fuel consumption is down by 4%, and anti-knock tech hidden in there somewhere means you can almost run it on used cooking oil. B. n. A substance added to an internal combustion engine's fuel, designed to reduce or prevent premature combustion. ΚΠ 1925 Proc. Conf. Tetraethyl Lead Gasoline (U.S. Public Health Bull. No. 158) 8 We tried one of the selenium metallo-organic compounds. We found that was an antiknock. 2013 News Jrnl. (Wilmington, Delaware) 5 June The manufacture of tetrathyl lead antiknocks. This entry has been updated (OED Third Edition, March 2022). < adj.n.1921
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