unleadedadj.n.

Brit.

/(ˌ)ʌnˈlɛdᵻd/, U.S.

/ˌənˈlɛdəd/

Forms: see un- prefix¹ and leaded adj.

Origin: Formed within English, by derivation. Etymons: un- prefix¹, leaded adj.

Etymology: < un- prefix¹ + leaded adj. Compare earlier unlead v.In sense A. 2 after lead n.¹ 8; compare later leaded adj. c.

A. adj.

a. Not covered, coated, or weighted with lead; not containing lead.

ΘΚΠ

the world > space > relative position > condition of being external > covering > uncovering > [adjective] > not covered by or as by other specific covering

unwoolled1538

unhoused1564

unleaded1586

uncanopied1613

unplanked1648

unarched1658

unpavilioned1775

unpapered1778

undraperied1802

unnetted1832

undamasked1838

matless1839

unpuddled1842

desquamated1845–6

sodlessa1847

unbaized1853

blanketless1863

unhooded1868

the world > matter > properties of materials > weight or relative heaviness > [adjective] > weighted > with lead, etc. > not

unleaded1909

1586 Edinb. Test. XVI. 366 in Dict. Older Sc. Tongue at (Unledit,) Unleidit, Aucht lane cannis leidit at iij s. the pece..[36] small lame cannis vnleidit at xl s. the dossoun.

1611 in Essex Rev. (1906) 15 47 The church is unleaded and unshingled.

1648 H. Hexham Groot Woorden-boeck Ongeloot, vnleaded, or Vnplumbt.

1664 P. D. C. tr. N. Le Fèvre Compend. Body Chymistry II. ii. viii. 131 Calcine the After-burthen in an Earthen unleaded Pot.

1887 ‘J. Bickerdyke’ Angling in Salt Water v. 73 The tackle consists of a long, stout, unleaded line.

1909 Westm. Gaz. 28 Aug. 2/2 The motion of the death-curtain, hanging free and unleaded from its headrope, would be inconceivably graceful.

1996 Irish Times (Nexis) 19 Jan. 13 Truth is irrepressible. It is like water on an unleaded roof.

2003 Independent 5 Sept. 16/5 The army had been testing unleaded bullets for target ranges.

b. Of petrol or other fuel: without added lead.The addition of tetraethyl lead to petrol as an anti-knocking agent was formerly widespread. However concerns about its detrimental effects on health and the environment led to the adoption of unleaded alternatives.

ΘΚΠ

society > occupation and work > materials > fuel > chemical fuel > [adjective] > properties or characteristics

premium1856

three-star1879

naphthous1885

paraffiny1902

propellant1919

pro-knock1927

high-octane1931

hi-octane1934

unleaded1934

monopropellant1949

nonleaded1955

super unleaded1978

1934 Ann. Amer. Acad. Polit. & Social Sci. 173 46/2 It is almost impossible in many localities to buy an unleaded fuel for stove or lamp use.

1958 New Scientist 6 Feb. 19 When the catalyst is used with ‘white’ or unleaded fuel (as on motorised trucks for indoor use in factories) this difficulty does not arise.

1995 Which? Sept. 38/2 Since the introduction of unleaded petrol in 1986, sales of unleaded fuel..have grown steadily year by year.

2016 Sun (Nexis) 12 Oct. 39 The average pump price of unleaded petrol is now 112.35p per litre.

2. Printing. Of type: not spaced with, or (in later use) as if with, leads between the lines. Cf. lead n.¹ 8.

ΘΚΠ

society > communication > printing > printed matter > arrangement or appearance of printed matter > [adjective] > having lines separated by leads > not

solid1808

unleaded1811

1811 S. T. Coleridge Coll. Lett. (1959) III. 328 The affair..might have been, as it was in several papers, compressed into a third of a Column—which took two & more unleaded ones.

1846 Western Lit. Messenger 12 Sept. 91/1 This work..contains one hundred and sixty six pages of unleaded composition.

1861 Blackwood's Edinb. Mag. Oct. 452/2 The owner of such an establishment is subject to no extraneous caprices about breadth of margins, size of type, quarto or folio, leaded or unleaded lines; he dictates his own terms.

1902 Westm. Gaz. 23 May 7/1 Tucked away in an unleaded telegram..is an item which may possess some significance.

1965 Indiana Mag. Hist. 61 156 This line-for-line reproduction is printed in a combination of ten point Century and eight point Intertype Baskerville, both unleaded.

2012 J. Rezek in L. L. Cohen & J. A. Stein Early Afr. Amer. Print Culture 345 Subsequent London editions of a text would often use smaller, unleaded type and thus have fewer pages.

B. n.

Petrol without added lead.

ΚΠ

1976 Ebony Apr. 17/3 (advt.) Its higher octane rating (..of about 92 for the average unleaded) can reduce knock and run-on in many cars.

1990 Independent on Sunday 28 Jan. 7 (advt.) Since 1977, Audi cars able to run on unleaded have been widely available.

2014 Yorks. Post 7 Nov. 5/3 Motorists will be delighted to see the price of unleaded dropping below £1.20.

This entry has been updated (OED Third Edition, June 2017; most recently modified version published online March 2022).

单词	unleaded
释义	unleadedadj.n. Brit. /(ˌ)ʌnˈlɛdᵻd/, U.S. /ˌənˈlɛdəd/ Forms: see un- prefix¹ and leaded adj. Origin: Formed within English, by derivation. Etymons: un- prefix¹, leaded adj. Etymology: < un- prefix¹ + leaded adj. Compare earlier unlead v.In sense A. 2 after lead n.¹ 8; compare later leaded adj. c. A. adj. 1. a. Not covered, coated, or weighted with lead; not containing lead. ΘΚΠ the world > space > relative position > condition of being external > covering > uncovering > [adjective] > not covered by or as by other specific covering unwoolled1538 unhoused1564 unleaded1586 uncanopied1613 unplanked1648 unarched1658 unpavilioned1775 unpapered1778 undraperied1802 unnetted1832 undamasked1838 matless1839 unpuddled1842 desquamated1845–6 sodlessa1847 unbaized1853 blanketless1863 unhooded1868 the world > matter > properties of materials > weight or relative heaviness > [adjective] > weighted > with lead, etc. > not unleaded1909 1586 Edinb. Test. XVI. 366 in Dict. Older Sc. Tongue at (Unledit,) Unleidit, Aucht lane cannis leidit at iij s. the pece..[36] small lame cannis vnleidit at xl s. the dossoun. 1611 in Essex Rev. (1906) 15 47 The church is unleaded and unshingled. 1648 H. Hexham Groot Woorden-boeck Ongeloot, vnleaded, or Vnplumbt. 1664 P. D. C. tr. N. Le Fèvre Compend. Body Chymistry II. ii. viii. 131 Calcine the After-burthen in an Earthen unleaded Pot. 1887 ‘J. Bickerdyke’ Angling in Salt Water v. 73 The tackle consists of a long, stout, unleaded line. 1909 Westm. Gaz. 28 Aug. 2/2 The motion of the death-curtain, hanging free and unleaded from its headrope, would be inconceivably graceful. 1996 Irish Times (Nexis) 19 Jan. 13 Truth is irrepressible. It is like water on an unleaded roof. 2003 Independent 5 Sept. 16/5 The army had been testing unleaded bullets for target ranges. b. Of petrol or other fuel: without added lead.The addition of tetraethyl lead to petrol as an anti-knocking agent was formerly widespread. However concerns about its detrimental effects on health and the environment led to the adoption of unleaded alternatives. ΘΚΠ society > occupation and work > materials > fuel > chemical fuel > [adjective] > properties or characteristics premium1856 three-star1879 naphthous1885 paraffiny1902 propellant1919 pro-knock1927 high-octane1931 hi-octane1934 unleaded1934 monopropellant1949 nonleaded1955 super unleaded1978 1934 Ann. Amer. Acad. Polit. & Social Sci. 173 46/2 It is almost impossible in many localities to buy an unleaded fuel for stove or lamp use. 1958 New Scientist 6 Feb. 19 When the catalyst is used with ‘white’ or unleaded fuel (as on motorised trucks for indoor use in factories) this difficulty does not arise. 1995 Which? Sept. 38/2 Since the introduction of unleaded petrol in 1986, sales of unleaded fuel..have grown steadily year by year. 2016 Sun (Nexis) 12 Oct. 39 The average pump price of unleaded petrol is now 112.35p per litre. 2. Printing. Of type: not spaced with, or (in later use) as if with, leads between the lines. Cf. lead n.¹ 8. ΘΚΠ society > communication > printing > printed matter > arrangement or appearance of printed matter > [adjective] > having lines separated by leads > not solid1808 unleaded1811 1811 S. T. Coleridge Coll. Lett. (1959) III. 328 The affair..might have been, as it was in several papers, compressed into a third of a Column—which took two & more unleaded ones. 1846 Western Lit. Messenger 12 Sept. 91/1 This work..contains one hundred and sixty six pages of unleaded composition. 1861 Blackwood's Edinb. Mag. Oct. 452/2 The owner of such an establishment is subject to no extraneous caprices about breadth of margins, size of type, quarto or folio, leaded or unleaded lines; he dictates his own terms. 1902 Westm. Gaz. 23 May 7/1 Tucked away in an unleaded telegram..is an item which may possess some significance. 1965 Indiana Mag. Hist. 61 156 This line-for-line reproduction is printed in a combination of ten point Century and eight point Intertype Baskerville, both unleaded. 2012 J. Rezek in L. L. Cohen & J. A. Stein Early Afr. Amer. Print Culture 345 Subsequent London editions of a text would often use smaller, unleaded type and thus have fewer pages. B. n. Petrol without added lead. ΚΠ 1976 Ebony Apr. 17/3 (advt.) Its higher octane rating (..of about 92 for the average unleaded) can reduce knock and run-on in many cars. 1990 Independent on Sunday 28 Jan. 7 (advt.) Since 1977, Audi cars able to run on unleaded have been widely available. 2014 Yorks. Post 7 Nov. 5/3 Motorists will be delighted to see the price of unleaded dropping below £1.20. This entry has been updated (OED Third Edition, June 2017; most recently modified version published online March 2022). < adj.n.1586
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