perihelionn.

Brit.

/ˌpɛrɪˈhiːlɪən/, U.S.

/ˌpɛrəˈhiljən/,

/ˌpɛrəˈhiliən/

Inflections: Plural perihelia.

Forms: 1600s–1700s perihelium, 1600s– perihelion.

Origin: A borrowing from Latin. Etymon: Latin perihelium.

Etymology: < post-classical Latin perihelium (J. Kepler Astronomia Nova (1609) 32) < peri- peri- prefix + ancient Greek ἥλιος sun (see helio- comb. form), after post-classical Latin perigeum perigeum n.; subsequently altered in form to perihelion after Greek nouns in -ον. Compare French périhélie (1690).

1. Astronomy. The point in the orbit of a planet, comet, etc., at which it is nearest to the sun. Opposed to aphelion n.

ΘΚΠ

the world > the universe > heavenly body > movement of heavenly bodies > [noun] > movement in orbit > orbit > parts of orbit

aphelion1656

perihelion1666

vector1704

elongation1708

orb1733

periaster1851

orbitale1901

Lagrangian point1962

1666 Philos. Trans. 1665–6 (Royal Soc.) 1 240 Not at present in the Perihelium of its Orbe, but nearer its Aphelium.

1676 E. Halley Let. 11 July in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 239 The perihelion distance [of a planet].

1715 tr. D. Gregory Elements Astron. I. i. §70. 147 In its ascent from the Sun, from the Perihelium to the Aphelium.

1734 J. Keill Exam. Burnet's Theory of Earth (ed. 2) 319 Comets..after their return from the Regions beyond Saturn, before they arrive at their Perihelia again.

1834 M. Somerville Connex. Physical Sci. (1835) xii. 108 The return of comets to their perihelia.

1867 G. F. Chambers Descr. Astron. iv. ii. 273 The 9^th of Dec. 1838 was the epoch of the next perihelion passage.

1880 A. R. Wallace Island Life viii. 138 During the period we are now discussing..the south polar area, having its winter in perihelion, would have had less ice.

1924 Science 5 Sept. 221/2 The perihelion of a planet's orbit moves forward in each revolution by an amount, [etc.].

1972 Jrnl. Brit. Astron. Assoc. 82 248 About a dozen of these asteroids—which have their perihelia inside the Earth's orbit—were known.

1991 C. A. Ronan Nat. Hist. Universe 145/1 Halley's Comet, like every other, loses some of its substance every time it passes perihelion.

2. figurative. A highest point, a zenith.

ΘΚΠ

the world > action or operation > prosperity > advancement or progress > [noun] > state of or advanced condition > highest point

prickOE

heighta1050

full1340

higha1398

pointc1400

roofa1500

top-castle1548

ruff1549

acmea1568

tip1567

noontide1578

high tide1579

superlative1583

summity1588

spring tide1593

meridian1594

period1595

apogee1600

punctilio1601

high-water mark1602

noon1609

zenith1610

auge1611

apex1624

culmination1633

cumble1640

culmen1646

climax1647

topc1650

cumulus1659

summit1661

perigeum1670

highest1688

consummation1698

stretch1741

high point1787

perihelion1804

summary1831

comble1832

heading up1857

climacteric1870

flashpoint1878

tip-end1885

peak1902

noontime1903

Omega point1981

1804 W. Taylor in Ann. Rev. 2 232 Mr. Pitt was now in the perihelion of his popularity.

1873 H. Spencer Study Sociol. ix. 239 From the perihelion of patriotism he is carried to the aphelion of anti-patriotism.

1960 I. Wallach Absence of Cello (1965) 19 She..kissed Andrew on top of the head, aiming at the spot an inch or so below the perihelion where the hair was somewhat thinner.

1999 D. Mahon Coll. Poems 20 A quart Decanter of laudanum—Perihelion of paradise!

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perihelion
释义	perihelionn. Brit. /ˌpɛrɪˈhiːlɪən/, U.S. /ˌpɛrəˈhiljən/, /ˌpɛrəˈhiliən/ Inflections: Plural perihelia. Forms: 1600s–1700s perihelium, 1600s– perihelion. Origin: A borrowing from Latin. Etymon: Latin perihelium. Etymology: < post-classical Latin perihelium (J. Kepler Astronomia Nova (1609) 32) < peri- peri- prefix + ancient Greek ἥλιος sun (see helio- comb. form), after post-classical Latin perigeum perigeum n.; subsequently altered in form to perihelion after Greek nouns in -ον. Compare French périhélie (1690). 1. Astronomy. The point in the orbit of a planet, comet, etc., at which it is nearest to the sun. Opposed to aphelion n. ΘΚΠ the world > the universe > heavenly body > movement of heavenly bodies > [noun] > movement in orbit > orbit > parts of orbit aphelion1656 perihelion1666 vector1704 elongation1708 orb1733 periaster1851 orbitale1901 Lagrangian point1962 1666 Philos. Trans. 1665–6 (Royal Soc.) 1 240 Not at present in the Perihelium of its Orbe, but nearer its Aphelium. 1676 E. Halley Let. 11 July in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) I. 239 The perihelion distance [of a planet]. 1715 tr. D. Gregory Elements Astron. I. i. §70. 147 In its ascent from the Sun, from the Perihelium to the Aphelium. 1734 J. Keill Exam. Burnet's Theory of Earth (ed. 2) 319 Comets..after their return from the Regions beyond Saturn, before they arrive at their Perihelia again. 1834 M. Somerville Connex. Physical Sci. (1835) xii. 108 The return of comets to their perihelia. 1867 G. F. Chambers Descr. Astron. iv. ii. 273 The 9^th of Dec. 1838 was the epoch of the next perihelion passage. 1880 A. R. Wallace Island Life viii. 138 During the period we are now discussing..the south polar area, having its winter in perihelion, would have had less ice. 1924 Science 5 Sept. 221/2 The perihelion of a planet's orbit moves forward in each revolution by an amount, [etc.]. 1972 Jrnl. Brit. Astron. Assoc. 82 248 About a dozen of these asteroids—which have their perihelia inside the Earth's orbit—were known. 1991 C. A. Ronan Nat. Hist. Universe 145/1 Halley's Comet, like every other, loses some of its substance every time it passes perihelion. 2. figurative. A highest point, a zenith. ΘΚΠ the world > action or operation > prosperity > advancement or progress > [noun] > state of or advanced condition > highest point prickOE heighta1050 full1340 higha1398 pointc1400 roofa1500 top-castle1548 ruff1549 acmea1568 tip1567 noontide1578 high tide1579 superlative1583 summity1588 spring tide1593 meridian1594 period1595 apogee1600 punctilio1601 high-water mark1602 noon1609 zenith1610 auge1611 apex1624 culmination1633 cumble1640 culmen1646 climax1647 topc1650 cumulus1659 summit1661 perigeum1670 highest1688 consummation1698 stretch1741 high point1787 perihelion1804 summary1831 comble1832 heading up1857 climacteric1870 flashpoint1878 tip-end1885 peak1902 noontime1903 Omega point1981 1804 W. Taylor in Ann. Rev. 2 232 Mr. Pitt was now in the perihelion of his popularity. 1873 H. Spencer Study Sociol. ix. 239 From the perihelion of patriotism he is carried to the aphelion of anti-patriotism. 1960 I. Wallach Absence of Cello (1965) 19 She..kissed Andrew on top of the head, aiming at the spot an inch or so below the perihelion where the hair was somewhat thinner. 1999 D. Mahon Coll. Poems 20 A quart Decanter of laudanum—Perihelion of paradise! This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1666
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