perihelion

[ per-uh-hee-lee-uhn, -heel-yuhn ]

/ ˌpɛr əˈhi li ən, -ˈhil yən /

noun, plural per·i·he·li·a [per-uh-hee-lee-uh, -heel-yuh]. /ˌpɛr əˈhi li ə, -ˈhil yə/. Astronomy.

the point in the orbit of a planet or comet at which it is nearest to the sun.

Compare aphelion.

Origin of perihelion

1660–70; <Greek peri-peri- + hḗli(os) sun + -on neuter noun suffix, on the model of perigee; earlier in the New Latin form perihelium

OTHER WORDS FROM perihelion

per·i·he·li·al, per·i·he·li·an, adjective

Words nearby perihelion

Périgord, Perigordian, Périgueux, perigynous, perigyny, perihelion, perihepatitis, peri-infarction block, perijejunitis, perikaryon, peril

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for perihelion

I'm not trying to calculate the perihelion of Jupiter or do 3D renderings of the National Cathedral.
Upgrading Ain't What It Used to Be|Megan McArdle|February 22, 2013|DAILY BEAST
Each time the comet comes back to perihelion in two and a half hours less than on the former occasion.
The Story of the Heavens|Robert Stawell Ball
If the comet be a periodic one, the same series of changes may take place at its next return to perihelion.
The Story of the Heavens|Robert Stawell Ball
It has its perihelion near the orbit of the earth, and its aphelion a little beyond that of Jupiter.
Letters on Astronomy|Denison Olmsted

The comet arrived at its perihelion on the thirteenth of March, only twenty-three days from the time assigned by Clairaut.
Letters on Astronomy|Denison Olmsted
Its abrupt display of vitality occurred two full months after perihelion.
A Popular History of Astronomy During the Nineteenth Century|Agnes M. (Agnes Mary) Clerke

British Dictionary definitions for perihelion

perihelion

/ (ˌpɛrɪˈhiːlɪən) /

noun plural -lia (-lɪə)

the point in its orbit when a planet or comet is nearest the sunCompare aphelion

Word Origin for perihelion

C17: from New Latin perihēlium, from peri- + Greek hēlios sun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for perihelion

perihelion

[ pĕr′ə-hē′lē-ən ]

The point at which an orbiting object, such as a planet or a comet, is closest to the Sun. Compare aphelion perigee.

单词	perihelion
释义	perihelion [ per-uh-hee-lee-uhn, -heel-yuhn ] / ˌpɛr əˈhi li ən, -ˈhil yən / noun, plural per·i·he·li·a [per-uh-hee-lee-uh, -heel-yuh]. /ˌpɛr əˈhi li ə, -ˈhil yə/. Astronomy. the point in the orbit of a planet or comet at which it is nearest to the sun. Compare aphelion. Origin of perihelion 1660–70; <Greek peri-peri- + hḗli(os) sun + -on neuter noun suffix, on the model of perigee; earlier in the New Latin form perihelium OTHER WORDS FROM perihelion per·i·he·li·al, per·i·he·li·an, adjective Words nearby perihelion Périgord, Perigordian, Périgueux, perigynous, perigyny, perihelion, perihepatitis, peri-infarction block, perijejunitis, perikaryon, peril Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for perihelion I'm not trying to calculate the perihelion of Jupiter or do 3D renderings of the National Cathedral. Upgrading Ain't What It Used to Be\|Megan McArdle\|February 22, 2013\|DAILY BEAST Each time the comet comes back to perihelion in two and a half hours less than on the former occasion. The Story of the Heavens\|Robert Stawell Ball If the comet be a periodic one, the same series of changes may take place at its next return to perihelion. The Story of the Heavens\|Robert Stawell Ball It has its perihelion near the orbit of the earth, and its aphelion a little beyond that of Jupiter. Letters on Astronomy\|Denison Olmsted The comet arrived at its perihelion on the thirteenth of March, only twenty-three days from the time assigned by Clairaut. Letters on Astronomy\|Denison Olmsted Its abrupt display of vitality occurred two full months after perihelion. A Popular History of Astronomy During the Nineteenth Century\|Agnes M. (Agnes Mary) Clerke British Dictionary definitions for perihelion perihelion / (ˌpɛrɪˈhiːlɪən) / noun plural -lia (-lɪə) the point in its orbit when a planet or comet is nearest the sunCompare aphelion Word Origin for perihelion C17: from New Latin perihēlium, from peri- + Greek hēlios sun Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for perihelion perihelion [ pĕr′ə-hē′lē-ən ] The point at which an orbiting object, such as a planet or a comet, is closest to the Sun. Compare aphelion perigee. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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