evectionn.

Brit.

/ᵻˈvɛkʃn/, U.S.

/əˈvɛkʃən/,

/iˈvɛkʃən/

Origin: A borrowing from Latin. Etymons: Latin ēvectiōn-, ēvectiō.

Etymology: < classical Latin ēvectiōn-, ēvectiō order establishing someone to travel by the state post, action of soaring aloft (2nd cent. a.d. in this sense), in post-classical Latin also promotion, elevation (6th cent.), inequality in the moon's longitude (1645 or earlier) < ēvect- , past participial stem of ēvehere to carry out or away, to carry up, to raise, exalt (see evect v.) + -iō -ion suffix¹.

†a. The action of carrying something out or forth. Obsolete. rare.Apparently only attested in dictionaries or glossaries.

ΘΚΠ

the world > movement > transference > [noun] > conveying or transporting > action of carrying > carrying out

exportance1634

evection1656

exportation1666

1656 T. Blount Glossographia Evection, a carrying out or forth.

b. The action of raising or lifting something up (literal and figurative); elevation, exaltation.

ΘΚΠ

society > society and the community > social class > [noun] > elevation or exaltation in rank

uprising1430

prelationa1450

sublimationc1450

ascendant1607

rise1608

superelevation1654

evection1658

elevation1701

1658 E. Phillips New World Eng. Words Evection, a lifting up, or carrying forth.

1659 J. Pearson Expos. Creed 513 His [sc. Joseph's] evection to the power of Egypt next to Pharaoh, signified the session of Christ at the right hand of his Father.

1699 in tr. M. Thévenot Art of Swimming Translator's Pref. sig. A3^v To consider it [sc. swimming] in its most general extent, as the Evection and sustentation of Bodies in Fluids..would be necessary to make the Theory perfect.

1833 U.S. Tel. (Washington, D.C.) 26 Aug. Our objection goes to the root of the matter. To the evection of the civil courts into ecclesiastical ones.

2012 D. F. Wallace in N.Y. Rev. Bks. 12 July 19/4 Updike's evection of the libidinous self appeared refreshing and even heroic.

2. Astronomy.

a. A small periodical deviation of the moon from its expected position; spec. (now only) a variation in the eccentricity of the moon's orbit around the earth, caused mainly by the attraction of the sun.Evection results in a maximum variation in the moon's position of 76 minutes in longitude and has a period of 31.8 days approx.Also known as the second inequality: see inequality n. 4.

ΚΠ

1657 J. Newton Astronomia Britannica ii. ix. 101 Being in or about her quarters, where she is farthest removed from the said Zyzigiacal line the angle of her evection is 2 deg. 50′ as is cleerely proved by the observations of Tycho and Bullialdus, whose method we follow, in our calculation of this inequality of the Moon, making 4362 the sine of the greatest evection to be the Diameter K D in the little circle K D C H.

1657 J. Newton Astronomia Britannica ii. x. 110 Subtract the true place of the Sun, from the Moones eccentrick place, so have you the distance of the luminaries, with the double whereof seeke in the Table the eccentricity of the Moones evection.

1710 Streete's Astronomia Carolina (ed. 2) 87 To the Logarithm of the Diameter of the Circle of Evection add the sine of the Distance of the Moon from the Sun, the sum rejecting the Radius is the Log. of the Chord of Evection.

1847 W. Whewell Philos. Inductive Sci. (new ed.) I. 229 Such is the announcement of the celebrated discovery of the moon's second inequality afterwards called by Bulhialdus evection.

1937 Proc. Aristotelian Soc. 37 64 The moon may depart from its Keplerian position by 76 minutes (2½ times its diameter), if we take account only of the inequality called the evection.

2012 R. Fitzpatrick Introd. Celestial Mech. x. 212 Evection can be thought of as causing a slight reduction in the eccentricity of the lunar orbit around the times of the new moon and the full moon.

†b. The libration of the moon, which causes a small variation in the part of the surface that is visible from the earth at any time. Cf. libration n. 2. Obsolete. rare.Perhaps the result of misunderstanding of the use of evection in a more general sense: cf. quot. 1657¹ at sense 2a. The dictionaries quoted also define evection in sense 2a.

ΘΚΠ

the world > the universe > planet > primary planet > moon > movement of moon > [noun] > libration

libration1670

evection1704

reflection1704

variation1704

1704 J. Harris Lexicon Technicum I Evection, or Libration of the Moon, is an Inequality in her Motion, by which, at or near the Quarters, she is not in that Line which passeth thro' the Centre of the Earth to the Sun, as she is at her Syzygies, or Conjunction and Opposition, but makes an Angle with that Line of 2 Degrees 50 Minutes, according to the Observation of Tycho, and Bullialdus.

1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 450 Evection is used by some astronomers for the Libration of the moon.

†3. The transfer of heat from a body by convection currents in a surrounding fluid. Obsolete.

ΚΠ

1838 Archit. Mag. Apr. 170 The proportions of heat radiated by combustible bodies in burning, to that carried off by ‘evection’, varies in every body.

1885 Bull. Amer. Iron & Steel Assoc. 28 Oct. 283/2 The loss by sensible heat in the waste gases, plus the loss by radiation and evection, is approximately made up by the heat brought in by the blast.

This entry has been updated (OED Third Edition, March 2018; most recently modified version published online June 2022).

单词	evection
释义	evectionn. Brit. /ᵻˈvɛkʃn/, U.S. /əˈvɛkʃən/, /iˈvɛkʃən/ Origin: A borrowing from Latin. Etymons: Latin ēvectiōn-, ēvectiō. Etymology: < classical Latin ēvectiōn-, ēvectiō order establishing someone to travel by the state post, action of soaring aloft (2nd cent. a.d. in this sense), in post-classical Latin also promotion, elevation (6th cent.), inequality in the moon's longitude (1645 or earlier) < ēvect- , past participial stem of ēvehere to carry out or away, to carry up, to raise, exalt (see evect v.) + -iō -ion suffix¹. 1. †a. The action of carrying something out or forth. Obsolete. rare.Apparently only attested in dictionaries or glossaries. ΘΚΠ the world > movement > transference > [noun] > conveying or transporting > action of carrying > carrying out exportance1634 evection1656 exportation1666 1656 T. Blount Glossographia Evection, a carrying out or forth. b. The action of raising or lifting something up (literal and figurative); elevation, exaltation. ΘΚΠ society > society and the community > social class > [noun] > elevation or exaltation in rank uprising1430 prelationa1450 sublimationc1450 ascendant1607 rise1608 superelevation1654 evection1658 elevation1701 1658 E. Phillips New World Eng. Words Evection, a lifting up, or carrying forth. 1659 J. Pearson Expos. Creed 513 His [sc. Joseph's] evection to the power of Egypt next to Pharaoh, signified the session of Christ at the right hand of his Father. 1699 in tr. M. Thévenot Art of Swimming Translator's Pref. sig. A3^v To consider it [sc. swimming] in its most general extent, as the Evection and sustentation of Bodies in Fluids..would be necessary to make the Theory perfect. 1833 U.S. Tel. (Washington, D.C.) 26 Aug. Our objection goes to the root of the matter. To the evection of the civil courts into ecclesiastical ones. 2012 D. F. Wallace in N.Y. Rev. Bks. 12 July 19/4 Updike's evection of the libidinous self appeared refreshing and even heroic. 2. Astronomy. a. A small periodical deviation of the moon from its expected position; spec. (now only) a variation in the eccentricity of the moon's orbit around the earth, caused mainly by the attraction of the sun.Evection results in a maximum variation in the moon's position of 76 minutes in longitude and has a period of 31.8 days approx.Also known as the second inequality: see inequality n. 4. ΚΠ 1657 J. Newton Astronomia Britannica ii. ix. 101 Being in or about her quarters, where she is farthest removed from the said Zyzigiacal line the angle of her evection is 2 deg. 50′ as is cleerely proved by the observations of Tycho and Bullialdus, whose method we follow, in our calculation of this inequality of the Moon, making 4362 the sine of the greatest evection to be the Diameter K D in the little circle K D C H. 1657 J. Newton Astronomia Britannica ii. x. 110 Subtract the true place of the Sun, from the Moones eccentrick place, so have you the distance of the luminaries, with the double whereof seeke in the Table the eccentricity of the Moones evection. 1710 Streete's Astronomia Carolina (ed. 2) 87 To the Logarithm of the Diameter of the Circle of Evection add the sine of the Distance of the Moon from the Sun, the sum rejecting the Radius is the Log. of the Chord of Evection. 1847 W. Whewell Philos. Inductive Sci. (new ed.) I. 229 Such is the announcement of the celebrated discovery of the moon's second inequality afterwards called by Bulhialdus evection. 1937 Proc. Aristotelian Soc. 37 64 The moon may depart from its Keplerian position by 76 minutes (2½ times its diameter), if we take account only of the inequality called the evection. 2012 R. Fitzpatrick Introd. Celestial Mech. x. 212 Evection can be thought of as causing a slight reduction in the eccentricity of the lunar orbit around the times of the new moon and the full moon. †b. The libration of the moon, which causes a small variation in the part of the surface that is visible from the earth at any time. Cf. libration n. 2. Obsolete. rare.Perhaps the result of misunderstanding of the use of evection in a more general sense: cf. quot. 1657¹ at sense 2a. The dictionaries quoted also define evection in sense 2a. ΘΚΠ the world > the universe > planet > primary planet > moon > movement of moon > [noun] > libration libration1670 evection1704 reflection1704 variation1704 1704 J. Harris Lexicon Technicum I Evection, or Libration of the Moon, is an Inequality in her Motion, by which, at or near the Quarters, she is not in that Line which passeth thro' the Centre of the Earth to the Sun, as she is at her Syzygies, or Conjunction and Opposition, but makes an Angle with that Line of 2 Degrees 50 Minutes, according to the Observation of Tycho, and Bullialdus. 1796 C. Hutton Math. & Philos. Dict. (new ed.) I. 450 Evection is used by some astronomers for the Libration of the moon. †3. The transfer of heat from a body by convection currents in a surrounding fluid. Obsolete. ΚΠ 1838 Archit. Mag. Apr. 170 The proportions of heat radiated by combustible bodies in burning, to that carried off by ‘evection’, varies in every body. 1885 Bull. Amer. Iron & Steel Assoc. 28 Oct. 283/2 The loss by sensible heat in the waste gases, plus the loss by radiation and evection, is approximately made up by the heat brought in by the blast. This entry has been updated (OED Third Edition, March 2018; most recently modified version published online June 2022). < n.1656
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