emissionn.
/ɪˈmɪʃən/ The action of emit v.† 1. The action of sending forth. Obsolete in general sense.† 2. The issuing, publication (of a book, a notice).
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the world > movement > transference > sending > [noun]
emission1607
mission1609
sending1627
1607 E. Topsell Hist. Foure-footed Beastes 230 Emission or sending away.
1646 Sir T. Browne Pseudodoxia Epidemica (L.) Populosity..requireth..emission of colonies. View more context for this quotation
1657 T. Hobbes Στιγμαι in Wks. (1845) VII. 398 The authority..of the Apostles in the emission of preachers to the infidels.
1827 G. S. Faber Origin Expiat. Sacrifice 197, (note) Noah seems to have twice selected that holyday for the emission of the dove.
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society > communication > printing > publishing > [noun]
publishingc1454
publication1573
uttering1579
editioning1716
emission1751
publishment1887
1751 S. Johnson Rambler No. 169. ⁋11 The tardy emission of Pope's compositions.
1779 S. Johnson Pope in Wks. IV. 40 The emission..of the Proposals for the Iliad.
3. The issuing or setting in circulation (bills, notes, shares, etc.). Also concrete.
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society > trade and finance > money > circulation of money > [noun]
course1457
gang1488
walking1549
current1586
currence1651
currency1699
emission1729
running1788
mobilization1801
monetarization1967
1729 B. Franklin Paper Currency in Wks. (1905) II. 141 I appeal to those immediately concerned..whether Land has not risen very much since the first Emission of what Paper Currency we now have.
1773 Gentleman's Mag. 43 295 All the emissions of their paper-currency..are forged.
1790 E. Burke Refl. Revol. in France 339 Proposing the emission of assignats. View more context for this quotation
1865 H. Phillips Amer. Paper Currency II. 36 A subsequent emission of bills of credit.
4.
a. The action of giving off or sending out (chiefly what is subtle or imponderable, light, heat, gases, odours, sounds, etc.). †Formerly also the sending forth (of the soul) in death; the allowing ‘the animal spirits’ to escape; and figurative the ‘pouring out’, ‘breathing forth’ (of affection, etc.).
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the world > movement > motion in a certain direction > going or coming out > letting or sending out > [noun] > emission
deliverancea1398
puttinga1398
voidinga1425
effusionc1477
vent?1507
evaporation1555
delivery1588
extramission1613
extromission1615
ejaculation1625
emissiona1626
discharge1653
disclusion1656
voidance1672
emitting1693
spout1771
evolution1783
emanation1822
a1626 F. Bacon Sylva Sylvarum (1627) 198 Tickling also causeth Laughter. The Cause may be, the Emission of the Spirits.
a1631 J. Donne Βιαθανατος (1647) iii. iv. §5 This actuall emission of his soule, which is death.
1660 Bp. J. Taylor Ductor Dubitantium i. iv, in Wks. (1855) IX. 161 The voice was..effective..in the direct emission.
1663 R. South Serm. preached Nov. 9, 1662 24 It [sc. affection] flamed up in direct fervours of devotion to God, and in collateral emissions of charity to its Neighbour.
1751 S. Johnson Rambler No. 146. ⁋9 Growing fainter..at a greater distance from the first emission.
1833 J. F. W. Herschel Astronomy x. 311 The tail of the..comet..occupied only two days in its emission from the comet's body.
1853 J. F. W. Herschel Pop. Lect. Sci. (1873) i. §35. 26 Puffs of smoke, at every moment of their emission from the crater.
1859 G. Wilson Gateways Knowl. (ed. 3) 77 The emission of fragrance.
1871 J. S. Blackie Four Phases Morals i. 71 The emission of sparks of light.
b. Optics. theory of emission = emission theory n. at Compounds below.
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1831 D. Brewster Treat. Optics xv. §94. 134 The Newtonian theory of light, or the theory of emission.
c. Physics. The action of giving off radiation or particles; a flow of electrons from a cathode-ray tube or other source.
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the world > matter > physics > electromagnetic radiation > [noun]
emission1900
radiation1908
the world > matter > physics > energy or power of doing work > [noun] > emission of energy
emission1900
radiation1908
the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > action of emitting electrons
emission1900
the world > matter > physics > electromagnetic radiation > solar radiation > [noun] > emitting radiation or particles
reradiation1827
emission1955
flux1971
the world > matter > physics > atomic nucleus > radioactivity > [noun] > emission of radiation
emission1955
the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > flow of electrons
emission1955
1900 Rutherford in London, Edinb. & Dublin Philos. Mag. 49 12 The results seem to point to a uniform rate of emission of the emanation at all pressures.
1955 W. Heisenberg in W. Pauli Niels Bohr & Devel. Physics 25 Let a measuring apparatus be placed in the neighbourhood, which registers the emission of an electron.
1955 Sci. Amer. June 40/3 It is from these bursts of emission that radio astronomers have obtained most of their new information about the Sun's activities.
5. concrete. That which is emitted; an emanation, effluvium.
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the world > movement > motion in a certain direction > going or coming out > [noun] > of intangible things or particles from an object > that which
streamc1374
expiration1576
project1596
deflux1603
defluxion1603
effluence1603
resultation1603
resultance1611
resultancy1613
effluxion1625
effluency1646
emanation1646
efflux1647
issue1659
emission1664
offshoot1674
elapsea1677
the world > movement > motion in a certain direction > going or coming out > letting or sending out > [noun] > emission > that which is emitted
egestionc1420
emission1664
disburdening1686
1664 H. Power Exper. Philos. iii. 155 The Magnetical Emissions..are..Corporeal Atoms.
1664 J. Evelyn Kalendarium Hortense 75 in Sylva Warm and benigne emissions of the Sun.
1871 J. Tyndall Fragm. Sci. (ed. 6) I. ii. 43 We obtain the value of the purely luminous emission.
6. Physiology. = Latin emissio seminis.
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the world > physical sensation > sexual relations > sexual activity > [noun] > ejaculation
emission1646
spending1856
ejaculation1888
coming1966
1646 Sir T. Browne Pseudodoxia Epidemica 371 There is no generation without a joynt emission . View more context for this quotation
1665 J. Glanvill Sciri Tuum: Authors Defense 34 in Scepsis Scientifica The other Instances of..Emissions.
1885 Law Rep.: Appeal Cases 10 176 Insufficient erection and a too early emission.
Compounds
emission nebula n. Astronomy a nebula which shines with its own light, produced inside it.
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the world > the universe > constellation > nebula > [noun] > nebula which shines with own light
emission nebula1956
1954 Physics Abstr. 57 1018/2 Two fundamental types of nebulae follow from this discussion: (1) the emission-type nebulae, consisting of atomic and ionized H, without dust, and (2) dark nebulae, with dust, consisting mainly of H2.]
1956 Austral. Jrnl. Physics 9 227 Ordinary emission nebulae emit radio waves as the result of their high electron temperature by the process of free-free transitions.
1974 Sci. Amer. Oct. 34/3 These reflection nebulas are useful for studying the properties of the interstellar dust grains, but they are distinguished from the true emission nebulas, which shine as a result of the atomic processes going on within them.
1978 J. M. Pasachoff & M. L. Kutner University Astron. xxiii. 573 The Great Nebula of Orion..is an emission nebula.
emission spectrum n. a spectrum which shows the radiations from an emitting source.
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the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > types of
Fraunhofer spectrum1837
gas spectrum1859
interference spectrum1860
flame spectrum1862
absorption spectrum1864
fluorescence spectrum1867
band spectrum1869
comparison spectrum1877
infra-red1881
emission spectrum1888
X-ray spectrum1910
1888 London, Edinb. & Dublin Philos. Mag. 5th Ser. 26 289 Ångström thought it improbable that oxygen should have a spectrum of such a character, since he failed to obtain an emission spectrum resembling it.
1930 G. Thomson Atom ii. 22 It is from the position of these black lines (Fraunhofer lines) that the nature of the substances present in the sun has been found. Such a black line spectrum is called an ‘absorption’ spectrum, in contrast to the bright line ‘emission’ spectrum.
1962 Listener 31 May 949/2 Surrounding the Sun is a layer made up of tenuous gas, which, if seen on its own, would produce an emission spectrum made up of isolated bright lines.
emission theory n. any theory of light or other radiation according to which it consists of streams of particles rather than waves.
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the world > matter > physics > electromagnetic radiation > light > [noun] > science of > emission theory
corpuscular theory1833
projectile theory1854
emission theory1880
1880 H. C. Bastian Brain 62 An emission theory..will not hold for the diffusion of light.
1926 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity i. 5 Finally for cathode rays the emission theory, and for Röntgen rays the wave theory held the field.
Draft additions June 2016
In plural. Pollutants or greenhouse gases released into the atmosphere by industrial or other human activity, vehicles, etc.; the quantity of such substances. Cf. zero-emission n. and adj. at zero n. and adj. Compounds 2.
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1966 Jrnl. Air Pollution Control Assoc. 16 15 (title) Emissions from carbureted and timed fuel injected engines.
1984 Christian Sci. Monitor 6 Apr. 9/3 The factory means jobs. There is no factory without emissions. It just has to be as environmentally friendly as possible.
1991 Ship & Boat Internat. Apr. 34/1 The advanced monobloc design of the SDP engine..offered significant advantages in terms of low emissions, low noise, good power to weight ratio and very competitive fuel consumption rating.
1995 Economist 1 Apr. 67/2 At Rio, the EU was the world's most forceful advocate of strong targets. Since then sundry proposed EU policies to reduce emissions—a carbon tax, for instance—have been pigeon-holed.
2010 Big Issue 4 Jan. 46/2 The term ‘climate justice’..means paying in full what we owe the developing world in lost land and food insecurity (as well as slashing emissions), and it's a concept we'll hear a lot about in the coming year.
Draft additions December 2019
emission line n. (in spectroscopy) a bright line in the spectrum of electromagnetic radiation coming from a source or substance, caused by emission at a particular wavelength; cf. emission spectrum n. at Compounds.Analysis of the emission spectrum of a given source (e.g. a star) can be used to determine the chemical composition of that source, as every atom and molecule emits electromagnetic radiation at a characteristic set of wavelengths whenever it returns to a lower-energy configuration from a higher-energy one. Cf. absorption line n. at absorption n. Compounds 2.
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1878 Nature 18 Apr. 499/1 An absorption-line is seen, with a wave-length of about 5,730, which is more refrangible than the yellow double emission line of potassium.
1922 A. D. Udden tr. N. Bohr Theory of Spectra iii. iv. 118 Emission lines of the X-ray spectra [are] due to transitions between the stationary states corresponding to these energy levels.
2012 R. B. Thompson & B. F. Thompson Illustr. Guide Home Forensic Sci. Exper. 71/1 Iron is present in some soils..in amounts large enough to provide prominent emission lines.
Draft additions June 2016
emissions trading n. the trading of permits that constrain businesses or institutions to pay for the pollutants and greenhouse gases they produce; the system of tradable permits by which such emissions are capped.
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1978 Chem. Week 13 Dec. 24/3 Among restrictions of the program are the requirement that only the same pollutant can be exchanged, and in certain categories, a ban on emissions trading.
1991 Sci. Amer. May 76/1 About five years ago, a series of overlapping events conspired to push emissions trading into the acid-rain limelight.
2008 Spirit of Change Spring 35 Co-op America urges consumers to avoid..‘climate exchange allowances’ (also known as ‘pollution trading’ or ‘emissions trading’), which many consider to be veiled ways of letting companies buy the right to pollute.
This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2019).
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