reversingn.

Brit.

/rᵻˈvəːsɪŋ/, U.S.

/rəˈvərsɪŋ/,

/riˈvərsɪŋ/

Forms: see reverse v.¹ and -ing suffix¹; also 1600s reuerseinge.

Origin: Formed within English, by derivation. Etymons: reverse v.¹, -ing suffix¹.

Etymology: < reverse v.¹ + -ing suffix¹. Compare earlier reversion n.¹

1. The action of reverse v.¹ (in various senses).In quot. ?a1425: the turning up of the eyelids.

ΘΚΠ

society > law > rule of law > illegality > [noun] > legal invalidity or faultiness > annulment or abrogation

reversing?a1425

repealing1431

abatementc1436

cancellingc1440

annullation1449

defeasance1456

voidance1488

reversal1489

reduction1496

repeal1503

extinguishment1528

disannulling1533

abrogation1535

obrogation1535

unplacing1554

nullity1555

reversement1572

reclaim1604

disaffirmancea1626

avoidance1628

rescinding1638

cassating1647

vacating1648

voiding1649

defease1650

annulment1651

unlawing1651

defeat1657

vacuating1684

peremption1726

invalidation1771

rescindment1783

supersession1790

disaffirmation1827

disenactment1859

discharge1892

the world > space > relative position > inversion > [noun]

turning1536

inversion1598

reversing1610

topsy-turvy1655

resupination1661

canting1769

retroversion1790

supernaculum1827

upturning1846

upending1968

society > leisure > dancing > movements or steps > [noun] > step > other steps

reprise1521

double1531

reprinse1531

single1531

hop1579

cross-pointa1592

trip1601

back-tricka1616

inturna1627

shorta1652

coupee1673

cut1676

fleuret1677

bourrée step or pas de bourrée1706

contretemps1706

cross-step1728

boring1775

pigeon wing1807

pas de basque1818

cross-cut1842

flicflac1852

buckle-covering1859

reverse1888

reversing1892

cross-stepping1893

box step1914

jump turn1924

moonwalk1969

coupé-

?a1425 tr. Guy de Chauliac Grande Chirurgie (N.Y. Acad. Med.) f. 128^v Reuersyng [?c1425 Paris Turnynge; L. Reuersatio] of palpebrez is separacioun of hem so þat þai may not couere þe eye.

a1450 De Oblacione Iugis Sacrificii (Titus) l. 825 in Wks. Lollard Preacher (2001) 178 So þan þat seche feiþfulnes wiþout any douȝting or obstinat reuersing o[r] [MS on] inpugning is onli dew to God.

1532 (c1385) Usk's Test. Loue in Wks. G. Chaucer iii. f. ccclviii^v Yet..in thy first alone by dyuers reasone was ful reuersynge to vnderstande.

1581 Act 23 Eliz. c. 3 §3 Any Writ of Error..for the Reversing of any Fine or Recovery heretofore passed.

1610 J. Guillim Display of Heraldrie i. viii. 35 Reuersing is a preposterous manner of location of a Coat-armour, by turning of the whole Escocheon vpside downe, contrary to the vsuall forme of bearing.

1676 G. Towerson Explic. Decalogue 536 He who so desires..the reversing of the divine institution.

1728 E. Chambers Cycl. (at cited word) Reversing is frequently practiced in figurative Counterpoint.

1788 T. Jefferson Miscellany 3 Mar. (1984) 651 As the upper edge of the wing of the share rises a little, the fore end..will rise..and will throw the hind end..so as to promote the reversing of the sod.

1855 T. B. Macaulay Hist. Eng. III. xii. 202 By the reversing of old attainders, and by new creations, seventeen more Lords..were introduced into the Upper House.

1892 E. Scott Dancing 198 I would particularly caution the pupil not to attempt reversing in public until he has thoroughly mastered the art in private.

1911 A. Bennett Card i. 10 Denny had one or two strictly private lessons in reversing.

1983 Buck & Hickman Catal. 1983–5 879 Multi-plate clutches facilitate starting and reversing of the main spindle.

2000 N. Townson Crisis of Democracy in Spain viii. 228 The dissidents criticized..the reversing of the anticlerical legislation.

2. spec. The action of driving a motor vehicle so as to travel backwards.

ΘΚΠ

society > travel > transport > transport or conveyance in a vehicle > driving or operating a vehicle > [noun] > driving or operating a motor vehicle > specific manoeuvres

reversing1896

U-turn1915

cutting-in1925

doughnut1951

cut-in1958

U-ey1976

1896 McClure's Mag. 7 160/2 Most persons would need instruction in changing speeds, steering, turning, stopping, and reversing, before venturing on a public road.

1900 W. W. Beaumont Motor Vehicles xiv. 246 The gearing..is for three speeds and reversing.

1929 J. B. Priestley Good Compan. i. ii. 67 Miss Trant discovered once again the terrors and dangers of reversing.

1959 Motor Man. (ed. 36) vi. 182 Reversing at night can be somewhat difficult.

2007 Official Theory Test for Drivers of Large Vehicles (ed. 9) xi. 317/1 Some large vehicles..may be fitted with an audible warning device for reversing.

Compounds

reversing lamp n. = reversing light n.

ΘΚΠ

society > travel > means of travel > a conveyance > vehicle > powered vehicle > parts and equipment of motor vehicles > [noun] > other exterior lights

side lamp1780

brake light1853

running light1863

spotlight1875

rear lamp1884

spotlamp1900

sidelight1906

parking lamp1926

parking light1927

reversing lamp1927

stop light1930

pass light1938

pass lamp1948

stop lamp1959

parker1967

1927 Times 19 Sept. 11/5 (advt.) The ‘reversing lamp’—a fitment that makes reversing down dark drives a pleasure.

1995 J. Miller & M. Stacey Driving Instructor's Handbk. (ed. 8) vi. 191 Reversing lamps may be fitted using one or two lamps of not more than 24 watts each... The lights may be operated automatically when reverse gear is selected or may have a separate switch.

reversing light n. a white light at the rear of a vehicle which turns on when the vehicle is reversing.

ΚΠ

1930 Times 7 Jan. 7/4 The equipment includes..double filament headlamp bulbs, a stop and reversing light at the back [etc.].

1990 Which? Apr. 232/1 Interior and electrically adjustable door mirrors gave good view. Feeble reversing light.

This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022).

reversingadj.

Brit.

/rᵻˈvəːsɪŋ/, U.S.

/rəˈvərsɪŋ/,

/riˈvərsɪŋ/

Origin: Formed within English, by derivation. Etymons: reverse v.¹, -ing suffix².

Etymology: < reverse v.¹ + -ing suffix². Compare earlier reversing n., reversingly adv.

a. That reverses; that causes or permits reversal.

ΘΚΠ

the world > movement > motion in a certain direction > backward movement > [adjective] > turning back or reversing course > serving to reverse

reversing1654

retrogradatory1788

the mind > mental capacity > memory > effacement, obliteration > cancellation, revocation > [adjective] > temporarily

suspending1656

reversinga1817

dissolutional1889

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

1654 W. Charleton Physiologia Epicuro-Gassendo-Charltoniana iii. iii. 158 The object is beheld through a Reversing Glass.

1727 A. Pope et al. Περι Βαθους: Art of Sinking 44 in J. Swift et al. Misc.: Last Vol. The Variegating, Confusing, or Reversing Tropes and Figures.

1773 E. Lloyd Epist. to D. Garrick 14 If we judge by his reversing rule, A Blockhead Lowth, and Shipley is a Fool.

1804 M. Lewis Jrnl. 22 July in Jrnls. Lewis & Clark Exped. (1986) IV. 201 The reversing telescope when employed as the eye-piece gave me a more full..image.

a1817 J. Austen Northanger Abbey (1818) II. xv. 320 No unworthy retraction.., no reversing decree of unjustifiable anger, could shake his fidelity.

1864 J. Percy Metall.: Iron & Steel 709 Reversing rolls have been employed, so that immediately the iron has passed through, the motion of the rolls is reversed.

1907 H. H. Norris Introd. Study Electr. Engin. x. 280 The function of the commutating or ‘inter’ pole is to produce a reversing field for the coil undergoing commutation.

1971 H. C. Town Design & Constr. Machine Tools ix. 194 If the reversing valve has to handle large volumes of oil..the reverse valve is better operated by a pilot valve which may be trip operated.

2008 N. Devon Jrnl. (Nexis) 28 Aug. 7 Neighbours say the racket from reversing lorries..is driving them to distraction.

b. Manufacturing Technology. Designating a rolling mill for sheet metal production in which the metal is passed backwards and forwards between a pair of rolls whose direction of rotation can be reversed.

ΚΠ

1862 J. A. Phillips & W. H. Dorman Truran's Iron Manuf. Great Brit. (ed. 2) Contents p. xii/2 Reversing mills.

1909 Jrnl. Iron & Steel Inst. 80 15 The capital cost of an electrically driven reversing-mill is greater than that of a steam-driven mill.

1970 R. W. Thomas Iron & Steel vi. 45/1 In a reversing hot rolling mill, the steel may have to be passed to and fro twenty or thirty times.

2006 R. A. Higgins Materials Engineers & Technicians (ed. 4) vii. 79 A steel-rolling shop consists of a powerful ‘two-high’ reversing mill..followed by trains of rolls.

2. Of an action, process, etc.: of the nature of or characterized by reversal.

ΘΚΠ

the world > action or operation > doing > [adjective] > characterized by reversal

reversing1821

1821 Repertory of Arts 2nd Ser. 39 200 It is..necessary when a reversing motion is adopted, to pay particular attention not only to the situation of the palls, but to the form of the ratchet-teeth.

1878 W. de W. Abney Treat. Photogr. (1881) 274 The red rays..have exerted a negative or reversing action on the sensitive plate.

1907 S. E. Sheppard & C. E. K. Mees Investigations Theory Photogr. Process ii. vi. 214 A reversing action of the released bromine may..be deduced from the failures of the Bunsen and Roscoe ‘reciprocity law’.

1991 Women's Day Best Ideas Winter 61/2 The ‘classic’ model also has reversing action and a self-service wrenchette to clear up most jams.

Compounds

reversing falls n. a tidal waterfall or rapid occurring in a sea inlet at a point where the channel is constricted by a rock formation, and over which the water flows in opposite directions at ebb and flood tides.

ΘΚΠ

the world > the earth > water > sea or ocean > region of sea or ocean > [noun] > rapids

reversing falls1901

1901 Daily Iowa State Press 12 Sept. 7/3 A second later a roaring waterfall and cataract is pitching headlong into the harbor..such are the reversing falls of the St. John river.

1961 E. Wahl This Land iv. 271 This oddity of nature, called the Reversing Falls, has been a great tourist attraction for many years.

1992 Up Here (Yellowknife, N.W. Territories) Oct. 44/3 Eleven metre tides cause a reversing falls—draining the lake at low tide and flooding it again when the tide is high.

reversing gear n. Mechanics = reverse gear n. at reverse adj. and adv. Compounds 2.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > which allows change of speed or direction > reverse

tumbling gear1793

reversing gear1831

reverse gear1835

reverse1882

1831 Mechanics' Mag. 25 Sept. 69/1 It must have been the reversing gear, and not the engineer, which was in fault.

1904 T. H. White Petrol Motors & Motor Cars ii. 108 When applied to an automobile, it is usual to make the reversing gear of a similar design to the slow-speed forward gear.

2007 Daily Tel. (Sydney) (Nexis) 13 Oct. 52 A switch on the gear lever moves the reversing gear from the main box and into the compound box.

reversing layer n. Astronomy now chiefly historical the lower region of the solar chromosphere, formerly regarded as a distinct layer where the dark Fraunhofer lines of the solar spectrum are produced, superimposed on the continuous spectrum of the underlying photosphere.

ΘΚΠ

the world > the universe > sun > [noun] > reversing layer

reversing layer1873

1873 Leeds Mercury 23 Sept. 6/3 There were, in all probability, no compounds ordinarily present in the sun's reversing layer.

1936 S. Chandrasekhar in Monthly Notices Royal Astron. Soc. 96 22 An obvious effect of the formation of the Fraunhofer lines in the ‘reversing layer’ is to keep the photosphere warmer.

1989 R. M. Goody & Y. L. Yung Atmospheric Radiation (ed. 2) 482 After falling to 4200 K in the reversing layer, the temperature rises to 20–50,000 K in the transition region..between chromosphere and corona.

2000 D. H. DeVorkin Henry Norris Russell xiv. 213 The old idea of a discrete reversing layer had to be modified.

reversing lever n. Mechanics a lever that reverses the motion of a mechanism; spec. = reverse lever n. at reverse adj. and adv. Compounds 2.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > which allows change of speed or direction > parts of

reversing lever1822

reverse lever1839

change-speed1881

reverse1882

Johnson bar1884

gate1906

synchromesh1929

hot shift1971

preselector1979

1822 R. Eastman in Techn. Repository 2 lvii. 222 Projection on the underside of the carriage, that actuates the reversing lever.

1915 Pop. Mech. Oct. 497/2 Reversing is accomplished by the simple process of swinging the reversing lever.

1971 Tools & their Uses (U.S. Navy Bureau of Naval Personnel) (1973) i. 9 A ratchet handle has a reversing lever which operates a pawl (or dog) inside the head of the tool.

2007 Daily Star (Nexis) 8 Feb. 29 I applied the reversing lever but it [sc. a traction engine] did not come to rest until rolling over Derek.

reversing propeller n. a reversible propeller; cf. reversible adj. 1c.

ΘΚΠ

society > travel > travel by water > vessel, ship, or boat > equipment of vessel > propulsion machinery > [noun] > propeller > types of

screw propeller1835

screw1839

reversing propeller1849

contrapropeller1927

1849 Ann. Rep. Commissioner Patents 1848 1086 in U.S. Congress. Serial Set (30th Congr., 2nd Sess.: House of Representatives Executive Doc. 59) Working such reversing propellers.

1907 F. Strickland Man. Petrol Motors & Motor Cars x. 151 In the small sizes [of marine motor] this is done by having..a reversing propeller.

1999 Sydney Morning Herald (Nexis) 18 Sept. 33 Skimming in over the flat blue sea, fat Hercules transports land in a roar of reversing propellers.

reversing stratum n. Astronomy now rare = reversing layer n.

ΚΠ

1879 Eng. Mech. 20 June 359/3 The reversing stratum which gives rise to the dark lines.

1901 Philos. Trans. (Royal Soc.) A. 196 395 The upper, more diffused portion of a true reversing stratum.

reversing thermometer n. a mercury thermometer which records the temperature when inverted and retains its reading until its orientation is restored, typically used to measure the temperature at depth in the ocean.

ΘΚΠ

the world > matter > properties of materials > temperature > measurement of temperature > [noun] > instrument > other specific instruments

air thermometer1701

water thermometer1725

gas thermometer1837

geothermometer1838

nepheloscope1844

thanatometer1860

resistance thermometer1861

reversing thermometer1878

telethermometer1880

thermocouple1890

thermo-electroscope1895

thermodynamometer1909

ebulliometer1933

1878 Nature 22 Aug. 449/1 Prof. Mohn speaks highly of the service rendered by Negretti and Zambra's new reversing thermometer.

1928 F. S. Russell & C. M. Yonge Seas xii. 260 A ‘reversing thermometer’ is used..so that if it be suddenly turned upside down the thread of mercury is broken and a permanent record of the temperature is obtained.

2002 Science 15 Feb. 1275/3 Before the 1970s, temperatures were derived from pressure-protected reversing thermometers, which were accurate to 0·02°C.

This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022).

单词	reversing
释义	reversingn. Brit. /rᵻˈvəːsɪŋ/, U.S. /rəˈvərsɪŋ/, /riˈvərsɪŋ/ Forms: see reverse v.¹ and -ing suffix¹; also 1600s reuerseinge. Origin: Formed within English, by derivation. Etymons: reverse v.¹, -ing suffix¹. Etymology: < reverse v.¹ + -ing suffix¹. Compare earlier reversion n.¹ 1. The action of reverse v.¹ (in various senses).In quot. ?a1425: the turning up of the eyelids. ΘΚΠ society > law > rule of law > illegality > [noun] > legal invalidity or faultiness > annulment or abrogation reversing?a1425 repealing1431 abatementc1436 cancellingc1440 annullation1449 defeasance1456 voidance1488 reversal1489 reduction1496 repeal1503 extinguishment1528 disannulling1533 abrogation1535 obrogation1535 unplacing1554 nullity1555 reversement1572 reclaim1604 disaffirmancea1626 avoidance1628 rescinding1638 cassating1647 vacating1648 voiding1649 defease1650 annulment1651 unlawing1651 defeat1657 vacuating1684 peremption1726 invalidation1771 rescindment1783 supersession1790 disaffirmation1827 disenactment1859 discharge1892 the world > space > relative position > inversion > [noun] turning1536 inversion1598 reversing1610 topsy-turvy1655 resupination1661 canting1769 retroversion1790 supernaculum1827 upturning1846 upending1968 society > leisure > dancing > movements or steps > [noun] > step > other steps reprise1521 double1531 reprinse1531 single1531 hop1579 cross-pointa1592 trip1601 back-tricka1616 inturna1627 shorta1652 coupee1673 cut1676 fleuret1677 bourrée step or pas de bourrée1706 contretemps1706 cross-step1728 boring1775 pigeon wing1807 pas de basque1818 cross-cut1842 flicflac1852 buckle-covering1859 reverse1888 reversing1892 cross-stepping1893 box step1914 jump turn1924 moonwalk1969 coupé- ?a1425 tr. Guy de Chauliac Grande Chirurgie (N.Y. Acad. Med.) f. 128^v Reuersyng [?c1425 Paris Turnynge; L. Reuersatio] of palpebrez is separacioun of hem so þat þai may not couere þe eye. a1450 De Oblacione Iugis Sacrificii (Titus) l. 825 in Wks. Lollard Preacher (2001) 178 So þan þat seche feiþfulnes wiþout any douȝting or obstinat reuersing o[r] [MS on] inpugning is onli dew to God. 1532 (c1385) Usk's Test. Loue in Wks. G. Chaucer iii. f. ccclviii^v Yet..in thy first alone by dyuers reasone was ful reuersynge to vnderstande. 1581 Act 23 Eliz. c. 3 §3 Any Writ of Error..for the Reversing of any Fine or Recovery heretofore passed. 1610 J. Guillim Display of Heraldrie i. viii. 35 Reuersing is a preposterous manner of location of a Coat-armour, by turning of the whole Escocheon vpside downe, contrary to the vsuall forme of bearing. 1676 G. Towerson Explic. Decalogue 536 He who so desires..the reversing of the divine institution. 1728 E. Chambers Cycl. (at cited word) Reversing is frequently practiced in figurative Counterpoint. 1788 T. Jefferson Miscellany 3 Mar. (1984) 651 As the upper edge of the wing of the share rises a little, the fore end..will rise..and will throw the hind end..so as to promote the reversing of the sod. 1855 T. B. Macaulay Hist. Eng. III. xii. 202 By the reversing of old attainders, and by new creations, seventeen more Lords..were introduced into the Upper House. 1892 E. Scott Dancing 198 I would particularly caution the pupil not to attempt reversing in public until he has thoroughly mastered the art in private. 1911 A. Bennett Card i. 10 Denny had one or two strictly private lessons in reversing. 1983 Buck & Hickman Catal. 1983–5 879 Multi-plate clutches facilitate starting and reversing of the main spindle. 2000 N. Townson Crisis of Democracy in Spain viii. 228 The dissidents criticized..the reversing of the anticlerical legislation. 2. spec. The action of driving a motor vehicle so as to travel backwards. ΘΚΠ society > travel > transport > transport or conveyance in a vehicle > driving or operating a vehicle > [noun] > driving or operating a motor vehicle > specific manoeuvres reversing1896 U-turn1915 cutting-in1925 doughnut1951 cut-in1958 U-ey1976 1896 McClure's Mag. 7 160/2 Most persons would need instruction in changing speeds, steering, turning, stopping, and reversing, before venturing on a public road. 1900 W. W. Beaumont Motor Vehicles xiv. 246 The gearing..is for three speeds and reversing. 1929 J. B. Priestley Good Compan. i. ii. 67 Miss Trant discovered once again the terrors and dangers of reversing. 1959 Motor Man. (ed. 36) vi. 182 Reversing at night can be somewhat difficult. 2007 Official Theory Test for Drivers of Large Vehicles (ed. 9) xi. 317/1 Some large vehicles..may be fitted with an audible warning device for reversing. Compounds reversing lamp n. = reversing light n. ΘΚΠ society > travel > means of travel > a conveyance > vehicle > powered vehicle > parts and equipment of motor vehicles > [noun] > other exterior lights side lamp1780 brake light1853 running light1863 spotlight1875 rear lamp1884 spotlamp1900 sidelight1906 parking lamp1926 parking light1927 reversing lamp1927 stop light1930 pass light1938 pass lamp1948 stop lamp1959 parker1967 1927 Times 19 Sept. 11/5 (advt.) The ‘reversing lamp’—a fitment that makes reversing down dark drives a pleasure. 1995 J. Miller & M. Stacey Driving Instructor's Handbk. (ed. 8) vi. 191 Reversing lamps may be fitted using one or two lamps of not more than 24 watts each... The lights may be operated automatically when reverse gear is selected or may have a separate switch. reversing light n. a white light at the rear of a vehicle which turns on when the vehicle is reversing. ΚΠ 1930 Times 7 Jan. 7/4 The equipment includes..double filament headlamp bulbs, a stop and reversing light at the back [etc.]. 1990 Which? Apr. 232/1 Interior and electrically adjustable door mirrors gave good view. Feeble reversing light. This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022). reversingadj. Brit. /rᵻˈvəːsɪŋ/, U.S. /rəˈvərsɪŋ/, /riˈvərsɪŋ/ Origin: Formed within English, by derivation. Etymons: reverse v.¹, -ing suffix². Etymology: < reverse v.¹ + -ing suffix². Compare earlier reversing n., reversingly adv. 1. a. That reverses; that causes or permits reversal. ΘΚΠ the world > movement > motion in a certain direction > backward movement > [adjective] > turning back or reversing course > serving to reverse reversing1654 retrogradatory1788 the mind > mental capacity > memory > effacement, obliteration > cancellation, revocation > [adjective] > temporarily suspending1656 reversinga1817 dissolutional1889 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 1654 W. Charleton Physiologia Epicuro-Gassendo-Charltoniana iii. iii. 158 The object is beheld through a Reversing Glass. 1727 A. Pope et al. Περι Βαθους: Art of Sinking 44 in J. Swift et al. Misc.: Last Vol. The Variegating, Confusing, or Reversing Tropes and Figures. 1773 E. Lloyd Epist. to D. Garrick 14 If we judge by his reversing rule, A Blockhead Lowth, and Shipley is a Fool. 1804 M. Lewis Jrnl. 22 July in Jrnls. Lewis & Clark Exped. (1986) IV. 201 The reversing telescope when employed as the eye-piece gave me a more full..image. a1817 J. Austen Northanger Abbey (1818) II. xv. 320 No unworthy retraction.., no reversing decree of unjustifiable anger, could shake his fidelity. View more context for this quotation 1864 J. Percy Metall.: Iron & Steel 709 Reversing rolls have been employed, so that immediately the iron has passed through, the motion of the rolls is reversed. 1907 H. H. Norris Introd. Study Electr. Engin. x. 280 The function of the commutating or ‘inter’ pole is to produce a reversing field for the coil undergoing commutation. 1971 H. C. Town Design & Constr. Machine Tools ix. 194 If the reversing valve has to handle large volumes of oil..the reverse valve is better operated by a pilot valve which may be trip operated. 2008 N. Devon Jrnl. (Nexis) 28 Aug. 7 Neighbours say the racket from reversing lorries..is driving them to distraction. b. Manufacturing Technology. Designating a rolling mill for sheet metal production in which the metal is passed backwards and forwards between a pair of rolls whose direction of rotation can be reversed. ΚΠ 1862 J. A. Phillips & W. H. Dorman Truran's Iron Manuf. Great Brit. (ed. 2) Contents p. xii/2 Reversing mills. 1909 Jrnl. Iron & Steel Inst. 80 15 The capital cost of an electrically driven reversing-mill is greater than that of a steam-driven mill. 1970 R. W. Thomas Iron & Steel vi. 45/1 In a reversing hot rolling mill, the steel may have to be passed to and fro twenty or thirty times. 2006 R. A. Higgins Materials Engineers & Technicians (ed. 4) vii. 79 A steel-rolling shop consists of a powerful ‘two-high’ reversing mill..followed by trains of rolls. 2. Of an action, process, etc.: of the nature of or characterized by reversal. ΘΚΠ the world > action or operation > doing > [adjective] > characterized by reversal reversing1821 1821 Repertory of Arts 2nd Ser. 39 200 It is..necessary when a reversing motion is adopted, to pay particular attention not only to the situation of the palls, but to the form of the ratchet-teeth. 1878 W. de W. Abney Treat. Photogr. (1881) 274 The red rays..have exerted a negative or reversing action on the sensitive plate. 1907 S. E. Sheppard & C. E. K. Mees Investigations Theory Photogr. Process ii. vi. 214 A reversing action of the released bromine may..be deduced from the failures of the Bunsen and Roscoe ‘reciprocity law’. 1991 Women's Day Best Ideas Winter 61/2 The ‘classic’ model also has reversing action and a self-service wrenchette to clear up most jams. Compounds reversing falls n. a tidal waterfall or rapid occurring in a sea inlet at a point where the channel is constricted by a rock formation, and over which the water flows in opposite directions at ebb and flood tides. ΘΚΠ the world > the earth > water > sea or ocean > region of sea or ocean > [noun] > rapids reversing falls1901 1901 Daily Iowa State Press 12 Sept. 7/3 A second later a roaring waterfall and cataract is pitching headlong into the harbor..such are the reversing falls of the St. John river. 1961 E. Wahl This Land iv. 271 This oddity of nature, called the Reversing Falls, has been a great tourist attraction for many years. 1992 Up Here (Yellowknife, N.W. Territories) Oct. 44/3 Eleven metre tides cause a reversing falls—draining the lake at low tide and flooding it again when the tide is high. reversing gear n. Mechanics = reverse gear n. at reverse adj. and adv. Compounds 2. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > which allows change of speed or direction > reverse tumbling gear1793 reversing gear1831 reverse gear1835 reverse1882 1831 Mechanics' Mag. 25 Sept. 69/1 It must have been the reversing gear, and not the engineer, which was in fault. 1904 T. H. White Petrol Motors & Motor Cars ii. 108 When applied to an automobile, it is usual to make the reversing gear of a similar design to the slow-speed forward gear. 2007 Daily Tel. (Sydney) (Nexis) 13 Oct. 52 A switch on the gear lever moves the reversing gear from the main box and into the compound box. reversing layer n. Astronomy now chiefly historical the lower region of the solar chromosphere, formerly regarded as a distinct layer where the dark Fraunhofer lines of the solar spectrum are produced, superimposed on the continuous spectrum of the underlying photosphere. ΘΚΠ the world > the universe > sun > [noun] > reversing layer reversing layer1873 1873 Leeds Mercury 23 Sept. 6/3 There were, in all probability, no compounds ordinarily present in the sun's reversing layer. 1936 S. Chandrasekhar in Monthly Notices Royal Astron. Soc. 96 22 An obvious effect of the formation of the Fraunhofer lines in the ‘reversing layer’ is to keep the photosphere warmer. 1989 R. M. Goody & Y. L. Yung Atmospheric Radiation (ed. 2) 482 After falling to 4200 K in the reversing layer, the temperature rises to 20–50,000 K in the transition region..between chromosphere and corona. 2000 D. H. DeVorkin Henry Norris Russell xiv. 213 The old idea of a discrete reversing layer had to be modified. reversing lever n. Mechanics a lever that reverses the motion of a mechanism; spec. = reverse lever n. at reverse adj. and adv. Compounds 2. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > cog or gear > which allows change of speed or direction > parts of reversing lever1822 reverse lever1839 change-speed1881 reverse1882 Johnson bar1884 gate1906 synchromesh1929 hot shift1971 preselector1979 1822 R. Eastman in Techn. Repository 2 lvii. 222 Projection on the underside of the carriage, that actuates the reversing lever. 1915 Pop. Mech. Oct. 497/2 Reversing is accomplished by the simple process of swinging the reversing lever. 1971 Tools & their Uses (U.S. Navy Bureau of Naval Personnel) (1973) i. 9 A ratchet handle has a reversing lever which operates a pawl (or dog) inside the head of the tool. 2007 Daily Star (Nexis) 8 Feb. 29 I applied the reversing lever but it [sc. a traction engine] did not come to rest until rolling over Derek. reversing propeller n. a reversible propeller; cf. reversible adj. 1c. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > propulsion machinery > [noun] > propeller > types of screw propeller1835 screw1839 reversing propeller1849 contrapropeller1927 1849 Ann. Rep. Commissioner Patents 1848 1086 in U.S. Congress. Serial Set (30th Congr., 2nd Sess.: House of Representatives Executive Doc. 59) Working such reversing propellers. 1907 F. Strickland Man. Petrol Motors & Motor Cars x. 151 In the small sizes [of marine motor] this is done by having..a reversing propeller. 1999 Sydney Morning Herald (Nexis) 18 Sept. 33 Skimming in over the flat blue sea, fat Hercules transports land in a roar of reversing propellers. reversing stratum n. Astronomy now rare = reversing layer n. ΚΠ 1879 Eng. Mech. 20 June 359/3 The reversing stratum which gives rise to the dark lines. 1901 Philos. Trans. (Royal Soc.) A. 196 395 The upper, more diffused portion of a true reversing stratum. reversing thermometer n. a mercury thermometer which records the temperature when inverted and retains its reading until its orientation is restored, typically used to measure the temperature at depth in the ocean. ΘΚΠ the world > matter > properties of materials > temperature > measurement of temperature > [noun] > instrument > other specific instruments air thermometer1701 water thermometer1725 gas thermometer1837 geothermometer1838 nepheloscope1844 thanatometer1860 resistance thermometer1861 reversing thermometer1878 telethermometer1880 thermocouple1890 thermo-electroscope1895 thermodynamometer1909 ebulliometer1933 1878 Nature 22 Aug. 449/1 Prof. Mohn speaks highly of the service rendered by Negretti and Zambra's new reversing thermometer. 1928 F. S. Russell & C. M. Yonge Seas xii. 260 A ‘reversing thermometer’ is used..so that if it be suddenly turned upside down the thread of mercury is broken and a permanent record of the temperature is obtained. 2002 Science 15 Feb. 1275/3 Before the 1970s, temperatures were derived from pressure-protected reversing thermometers, which were accurate to 0·02°C. This entry has been updated (OED Third Edition, March 2010; most recently modified version published online March 2022). < n.?a1425adj.1654
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