megatonn.

Brit.

/ˈmɛɡətʌn/, U.S.

/ˈmɛɡəˌtən/,

/ˈmɛɡəˌtɑn/

Forms: 1900s– megaton, 1900s– megatonne.

Origin: Formed within English, by compounding. Etymons: mega- comb. form, ton n.¹

Etymology: < mega- comb. form + ton n.¹ Compare French mégatonne (1950).With the form megatonne compare tonne n. and see note at sense 1.

1. A unit of explosive power, equal to that of one million tons of TNT and used chiefly with reference to nuclear weapons. Frequently attributive.The unit may be calculated in either imperial or metric tons; the form megatonne generally implies the metric unit.

ΘΚΠ

the world > matter > physics > atomic nucleus > nuclear fission > nuclear explosion > [noun] > unit of explosive power

kiloton1952

megaton1952

1952 N.Y. Herald-Tribune 18 June 23/7 The first true super-bomb to be detonated is expected to have a power of two megatons.

1955 Times 30 May 7/7 The Pacific tests in 1952 and 1954 showed that a hydrogen bomb equivalent to 10 to 15 million tons of T.N.T. (commonly called 10–15 megatons) dropped on the centre of an ordinary city would cause total destruction within a circle of four to five miles.

1962 Newnes Conc. Encycl. Nucl. Energy 48/1 A Bikini-type megaton bomb would destroy completely most ordinary buildings in an area of 84 square miles.

1988 New Scientist 8 Sept. 34/3 An explosion estimated at equivalent to 50 megatonnes of TNT which devastated a wide area but left no crater.

1996 Focus Apr. 64 (caption) Just 50 grams of antimatter has the clout of a one-megaton H-bomb.

2. figurative.

ΘΚΠ

the world > relative properties > quantity > greatness of quantity, amount, or degree > [noun] > (a) great quantity or amount

felec825

muchc1230

good wone1297

plentyc1300

bushelc1374

sight1390

mickle-whata1393

forcea1400

manynessa1400

multitudea1400

packc1400

a good dealc1430

greata1450

sackful1484

power1489

horseloadc1500

mile1508

lump1523

a deal?1532

peckc1535

heapa1547

mass1566

mass1569

gallon1575

armful1579

cart-load1587

mickle1599

bushelful1600–12

a load1609

wreck1612

parisha1616

herd1618

fair share1650

heapa1661

muchness1674

reams1681

hantle1693

mort1694

doll?1719

lift1755

acre1759

beaucoup1760

ton1770

boxload1795

boatload1807

lot1811

dollop1819

swag1819

faggald1824

screed1826

Niagara1828

wad1828

lashings1829

butt1831

slew1839

ocean1840

any amount (of)1848

rake1851

slather1857

horde1860

torrent1864

sheaf1865

oodlesa1867

dead load1869

scad1869

stack1870

jorum1872

a heap sight1874

firlot1883

oodlings1886

chunka1889

whips1888

God's quantity1895

streetful1901

bag1917

fid1920

fleetful1923

mob1927

bucketload1930

pisspot1944

shitload1954

megaton1957

mob-o-ton1975

gazillion1978

buttload1988

shit ton1991

1957 M. Shulman Rally round Flag, Boys! (1958) vi. 74 A broth of a woman..filled with energy in the megaton range.

1969 N. Cohn Pop from Beginning ix. 85 Music splintering and feet shuffling, butts twitching by the megaton.

1995 Denver Post 16 Jan. 1/3 With megaton hits such as ‘Forrest Gump’ and ‘The Lion King’, 1994 was expected to be Boffo II.

3. One million tons or tonnes (see note at sense 1). Frequently figurative or hyperbolically: an enormous amount. Cf. ton n.¹ 4b.

ΘΚΠ

the world > relative properties > quantity > greatness of quantity, amount, or degree > [noun] > vastness of quantity or amount > (a) vast quantity or amount

worldOE

seaa1200

fernc1325

mountain1570

ocean1590

microcosm1611

immensity1778

vast1793

worldful1835

oceanful1838

megaton1971

1971 Proc. National Acad. Sci. U.S.A. 68 1939/1 Power plants..are responsible for over half of the current sulfur oxide emissions in the United States—close to 20 megatons per year.

1976 Aviation Week (Nexis) 31 May 69 Among the key areas for research are the lunar mass driver (now estimated as capable of launching about one megaton per year).

1981 R. Davies Rebel Angels (1983) vii. 143 The unionized professors and the unionized support staff and the meccano the scientists and doctors demand, all cost megatons of money.

1993 Canad. Living (Toronto) July 63/1 The word sand is more likely to evoke visions of Lawrence of Arabia or a beach in the Caribbean than Canada. Strange, because we have megatonnes of the stuff.

This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).

单词	megaton
释义	megatonn. Brit. /ˈmɛɡətʌn/, U.S. /ˈmɛɡəˌtən/, /ˈmɛɡəˌtɑn/ Forms: 1900s– megaton, 1900s– megatonne. Origin: Formed within English, by compounding. Etymons: mega- comb. form, ton n.¹ Etymology: < mega- comb. form + ton n.¹ Compare French mégatonne (1950).With the form megatonne compare tonne n. and see note at sense 1. 1. A unit of explosive power, equal to that of one million tons of TNT and used chiefly with reference to nuclear weapons. Frequently attributive.The unit may be calculated in either imperial or metric tons; the form megatonne generally implies the metric unit. ΘΚΠ the world > matter > physics > atomic nucleus > nuclear fission > nuclear explosion > [noun] > unit of explosive power kiloton1952 megaton1952 1952 N.Y. Herald-Tribune 18 June 23/7 The first true super-bomb to be detonated is expected to have a power of two megatons. 1955 Times 30 May 7/7 The Pacific tests in 1952 and 1954 showed that a hydrogen bomb equivalent to 10 to 15 million tons of T.N.T. (commonly called 10–15 megatons) dropped on the centre of an ordinary city would cause total destruction within a circle of four to five miles. 1962 Newnes Conc. Encycl. Nucl. Energy 48/1 A Bikini-type megaton bomb would destroy completely most ordinary buildings in an area of 84 square miles. 1988 New Scientist 8 Sept. 34/3 An explosion estimated at equivalent to 50 megatonnes of TNT which devastated a wide area but left no crater. 1996 Focus Apr. 64 (caption) Just 50 grams of antimatter has the clout of a one-megaton H-bomb. 2. figurative. ΘΚΠ the world > relative properties > quantity > greatness of quantity, amount, or degree > [noun] > (a) great quantity or amount felec825 muchc1230 good wone1297 plentyc1300 bushelc1374 sight1390 mickle-whata1393 forcea1400 manynessa1400 multitudea1400 packc1400 a good dealc1430 greata1450 sackful1484 power1489 horseloadc1500 mile1508 lump1523 a deal?1532 peckc1535 heapa1547 mass1566 mass1569 gallon1575 armful1579 cart-load1587 mickle1599 bushelful1600–12 a load1609 wreck1612 parisha1616 herd1618 fair share1650 heapa1661 muchness1674 reams1681 hantle1693 mort1694 doll?1719 lift1755 acre1759 beaucoup1760 ton1770 boxload1795 boatload1807 lot1811 dollop1819 swag1819 faggald1824 screed1826 Niagara1828 wad1828 lashings1829 butt1831 slew1839 ocean1840 any amount (of)1848 rake1851 slather1857 horde1860 torrent1864 sheaf1865 oodlesa1867 dead load1869 scad1869 stack1870 jorum1872 a heap sight1874 firlot1883 oodlings1886 chunka1889 whips1888 God's quantity1895 streetful1901 bag1917 fid1920 fleetful1923 mob1927 bucketload1930 pisspot1944 shitload1954 megaton1957 mob-o-ton1975 gazillion1978 buttload1988 shit ton1991 1957 M. Shulman Rally round Flag, Boys! (1958) vi. 74 A broth of a woman..filled with energy in the megaton range. 1969 N. Cohn Pop from Beginning ix. 85 Music splintering and feet shuffling, butts twitching by the megaton. 1995 Denver Post 16 Jan. 1/3 With megaton hits such as ‘Forrest Gump’ and ‘The Lion King’, 1994 was expected to be Boffo II. 3. One million tons or tonnes (see note at sense 1). Frequently figurative or hyperbolically: an enormous amount. Cf. ton n.¹ 4b. ΘΚΠ the world > relative properties > quantity > greatness of quantity, amount, or degree > [noun] > vastness of quantity or amount > (a) vast quantity or amount worldOE seaa1200 fernc1325 mountain1570 ocean1590 microcosm1611 immensity1778 vast1793 worldful1835 oceanful1838 megaton1971 1971 Proc. National Acad. Sci. U.S.A. 68 1939/1 Power plants..are responsible for over half of the current sulfur oxide emissions in the United States—close to 20 megatons per year. 1976 Aviation Week (Nexis) 31 May 69 Among the key areas for research are the lunar mass driver (now estimated as capable of launching about one megaton per year). 1981 R. Davies Rebel Angels (1983) vii. 143 The unionized professors and the unionized support staff and the meccano the scientists and doctors demand, all cost megatons of money. 1993 Canad. Living (Toronto) July 63/1 The word sand is more likely to evoke visions of Lawrence of Arabia or a beach in the Caribbean than Canada. Strange, because we have megatonnes of the stuff. This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022). < n.1952
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