knock-onn.adj.

Etymology: < the verbal phrase to knock on at knock v. Phrasal verbs.

A. n.

(ˈknock-ˈon.) Rugby. The act of knocking the ball forward or ‘on’: see to knock on at knock v. Phrasal verbs.

ΘΚΠ

society > leisure > sport > types of sport or game > ball game > football > rugby football > [noun] > foul

knock-on1845

throw on1845

foot-up1899

spear tackle1969

1845 W. D. Arnold et al. Football Rules of Rugby School in J. Smith Orig. Rules Rugby (2007) 46 Kick out must not be from more than..twenty-five yards [out of goal], if a punt, drop, or knock on.

1881 Laws Rugby Union §28 A Fair Catch is a catch made direct from a kick or a throw forward, or a knock on by one of the opposite side, or from a punt out or a punt on.

1888 Daily News 5 Oct. 5/2 A knock-on gives a free kick.

1893 in B. F. Robinson Rugby Football (1896) 325 In case of a throw-forward or knock-on, the ball shall be at once brought back to where such infringement took place.

1905 Daily Chron. 29 Dec. 9/5 The alleged incident of the referee in the New Zealanders–Newport match sounding the whistle when a knock-on by an All Black proved to the advantage of the Welsh team was..contrary to law.

1960 Times 11 Jan. 17/1 A body of dedicated Scots thought that France's last [try] followed a knock-on.

1974 Sunday Tel. 23 June 35/7 The referee did not see the knock-on.

B. adj. (ˈknock-on.)

1. Physics. Ejected, produced, or caused as a result of the collision of an atomic or subatomic particle with an atom.

ΘΚΠ

the world > matter > physics > atomic physics > [adjective] > resulting from collision

knock-on1940

1940 Nature 13 July 65/2 A few particles of energy greater than 10⁸ ev...were therefore considered to be mesons responsible for the production of ‘knock on’ showers.

1953 Jrnl. Brit. Interplanetary Soc. 12 203 These [sc. nuclear fragments] may be accompanied by knock-on particles (or shower particles) which also move with velocities comparable to the original particle.

1967 A. H. Cottrell Introd. Metall. ii. 14 There are three main types of radiation damage... (3) Knock-on damage in which atoms inside the material are knocked from their sites by the impacts of nuclear particles.

1971 Nature 6 Aug. 422/2 Knock-on protons produced by 3MeV neutrons would not..produce visible flashes.

2. Designating a mechanical part (e.g. of a vehicle) that may be attached or fastened by knocking. Also absol.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > other parts > [adjective] > other specific parts

self-balancing1796

epicyclic1841

slotted1849

reversing1864

kinematic1876

self-aligning1889

knock-off1896

underslung1909

self-cancelling1933

knock-on1952

toleranced1953

select1974

1952 Motor Man. (ed. 34) vii. 150 There are two principal types of wheel fastening. The less common, known as the knock-on, has at its centre a large nut with two lugs or projections.

1952 Motor Man. (ed. 34) vii. p. x Knock on wheel fastening.

1959 Times 12 Sept. 3/3 Moss's car has knock-on wheels.

1965 Punch 20 Oct. 567/2 The imitation knock-on hubs had been knocked off by genuine thieves.

1967 I. Hamilton Man with Brown Paper Face ii. 24 The strengthened knock-on wire wheels were original M.G.

Draft additions June 2003

attributive. Chiefly British. Being a secondary or indirect consequence of another action, occurrence, or event; knock-on effect n. a secondary, indirect, or cumulative effect.

ΚΠ

1972 Times 18 Apr. 2/3 They would be more than willing to move towards a minimum wage of about £20 a week..if they could be assured..that there would be no ‘knock-on effect’ in the differentials demanded by the rest of the labour force.

1983 Listener 24 Nov. 4/3 The knock-on effect of losing the surface plankton life might prove crucial.

1990 Internat. Freighting Weekly (Nexis) 13 Aug. 1 The ruptured trade relations between Iraq and Britain have knock-on consequences for the repayment of loans.

2000 Z. Sardar Consumption Kuala Lumpur 191 The financial system of Thailand went into collapse and the knock-on effect rippled across the region.

This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2021).

单词	knock-on
释义	knock-onn.adj. Etymology: < the verbal phrase to knock on at knock v. Phrasal verbs. A. n. (ˈknock-ˈon.) Rugby. The act of knocking the ball forward or ‘on’: see to knock on at knock v. Phrasal verbs. ΘΚΠ society > leisure > sport > types of sport or game > ball game > football > rugby football > [noun] > foul knock-on1845 throw on1845 foot-up1899 spear tackle1969 1845 W. D. Arnold et al. Football Rules of Rugby School in J. Smith Orig. Rules Rugby (2007) 46 Kick out must not be from more than..twenty-five yards [out of goal], if a punt, drop, or knock on. 1881 Laws Rugby Union §28 A Fair Catch is a catch made direct from a kick or a throw forward, or a knock on by one of the opposite side, or from a punt out or a punt on. 1888 Daily News 5 Oct. 5/2 A knock-on gives a free kick. 1893 in B. F. Robinson Rugby Football (1896) 325 In case of a throw-forward or knock-on, the ball shall be at once brought back to where such infringement took place. 1905 Daily Chron. 29 Dec. 9/5 The alleged incident of the referee in the New Zealanders–Newport match sounding the whistle when a knock-on by an All Black proved to the advantage of the Welsh team was..contrary to law. 1960 Times 11 Jan. 17/1 A body of dedicated Scots thought that France's last [try] followed a knock-on. 1974 Sunday Tel. 23 June 35/7 The referee did not see the knock-on. B. adj. (ˈknock-on.) 1. Physics. Ejected, produced, or caused as a result of the collision of an atomic or subatomic particle with an atom. ΘΚΠ the world > matter > physics > atomic physics > [adjective] > resulting from collision knock-on1940 1940 Nature 13 July 65/2 A few particles of energy greater than 10⁸ ev...were therefore considered to be mesons responsible for the production of ‘knock on’ showers. 1953 Jrnl. Brit. Interplanetary Soc. 12 203 These [sc. nuclear fragments] may be accompanied by knock-on particles (or shower particles) which also move with velocities comparable to the original particle. 1967 A. H. Cottrell Introd. Metall. ii. 14 There are three main types of radiation damage... (3) Knock-on damage in which atoms inside the material are knocked from their sites by the impacts of nuclear particles. 1971 Nature 6 Aug. 422/2 Knock-on protons produced by 3MeV neutrons would not..produce visible flashes. 2. Designating a mechanical part (e.g. of a vehicle) that may be attached or fastened by knocking. Also absol. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > other parts > [adjective] > other specific parts self-balancing1796 epicyclic1841 slotted1849 reversing1864 kinematic1876 self-aligning1889 knock-off1896 underslung1909 self-cancelling1933 knock-on1952 toleranced1953 select1974 1952 Motor Man. (ed. 34) vii. 150 There are two principal types of wheel fastening. The less common, known as the knock-on, has at its centre a large nut with two lugs or projections. 1952 Motor Man. (ed. 34) vii. p. x Knock on wheel fastening. 1959 Times 12 Sept. 3/3 Moss's car has knock-on wheels. 1965 Punch 20 Oct. 567/2 The imitation knock-on hubs had been knocked off by genuine thieves. 1967 I. Hamilton Man with Brown Paper Face ii. 24 The strengthened knock-on wire wheels were original M.G. Draft additions June 2003 attributive. Chiefly British. Being a secondary or indirect consequence of another action, occurrence, or event; knock-on effect n. a secondary, indirect, or cumulative effect. ΚΠ 1972 Times 18 Apr. 2/3 They would be more than willing to move towards a minimum wage of about £20 a week..if they could be assured..that there would be no ‘knock-on effect’ in the differentials demanded by the rest of the labour force. 1983 Listener 24 Nov. 4/3 The knock-on effect of losing the surface plankton life might prove crucial. 1990 Internat. Freighting Weekly (Nexis) 13 Aug. 1 The ruptured trade relations between Iraq and Britain have knock-on consequences for the repayment of loans. 2000 Z. Sardar Consumption Kuala Lumpur 191 The financial system of Thailand went into collapse and the knock-on effect rippled across the region. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2021). < n.adj.1845
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