aphelion

[ uh-fee-lee-uhn, uh-feel-yuhn, ap-hee-lee-uhn ]

/ əˈfi li ən, əˈfil yən, æpˈhi li ən /

noun, plural a·phe·li·a [uh-fee-lee-uh, uh-feel-yuh, ap-hee-lee-uh]. /əˈfi li ə, əˈfil yə, æpˈhi li ə/.

Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun.

Compare perihelion.

Origin of aphelion

1650–60; Hellenized form of New Latin aphēlium<Greek *aphḗlion (diástēma) off-sun (distance), neuter of *aphḗlios (adj.), equivalent to ap-ap-² + hḗli(os) sun + -os adj. suffix. See apogee

OTHER WORDS FROM aphelion

a·phe·li·an, adjective

Words nearby aphelion

aphanitic, aphasia, aphasic, aphasiology, aphelandra, aphelion, apheliotropic, apheliotropism, aphemia, apheresis, aphesis

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

Example sentences from the Web for aphelion

The motion of Newton's comet at aphelion may be equally slight.
The Education of Henry Adams|Henry Adams
When the earth leaves the aphelion, a reaction takes place, being most rapid in September.
Outlines of a Mechanical Theory of Storms|T. Bassnett
An irregularity in the motion of a planet by which it deviates from the aphelion or apogee.
The Sailor's Word-Book|William Henry Smyth
It has its perihelion near the orbit of the earth, and its aphelion a little beyond that of Jupiter.
Letters on Astronomy|Denison Olmsted

Whereas at its greatest distance from the sun (aphelion) the velocity is reduced to about 10 feet a second!
Astronomical Curiosities|J. Ellard Gore

British Dictionary definitions for aphelion

aphelion

/ (æpˈhiːlɪən, əˈfiː-) /

noun plural -lia (-lɪə)

the point in its orbit when a planet or comet is at its greatest distance from the sunCompare perihelion

Derived forms of aphelion

aphelian, adjective

Word Origin for aphelion

C17: from New Latin aphēlium (with pseudo-Greek ending -ion) from ap- + 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 aphelion

aphelion

[ ə-fē′lē-ən ]

The point at which an orbiting body, such as a planet or comet, is farthest away from the Sun. Compare apogee perihelion.

单词	aphelion
释义	aphelion [ uh-fee-lee-uhn, uh-feel-yuhn, ap-hee-lee-uhn ] / əˈfi li ən, əˈfil yən, æpˈhi li ən / noun, plural a·phe·li·a [uh-fee-lee-uh, uh-feel-yuh, ap-hee-lee-uh]. /əˈfi li ə, əˈfil yə, æpˈhi li ə/. Astronomy. the point in the orbit of a planet or a comet at which it is farthest from the sun. Compare perihelion. Origin of aphelion 1650–60; Hellenized form of New Latin aphēlium<Greek aphḗlion (diástēma) off-sun (distance), neuter of aphḗlios (adj.), equivalent to ap-ap-² + hḗli(os) sun + -os adj. suffix. See apogee OTHER WORDS FROM aphelion a·phe·li·an, adjective Words nearby aphelion aphanitic, aphasia, aphasic, aphasiology, aphelandra, aphelion, apheliotropic, apheliotropism, aphemia, apheresis, aphesis Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for aphelion The motion of Newton's comet at aphelion may be equally slight. The Education of Henry Adams\|Henry Adams When the earth leaves the aphelion, a reaction takes place, being most rapid in September. Outlines of a Mechanical Theory of Storms\|T. Bassnett An irregularity in the motion of a planet by which it deviates from the aphelion or apogee. The Sailor's Word-Book\|William Henry Smyth It has its perihelion near the orbit of the earth, and its aphelion a little beyond that of Jupiter. Letters on Astronomy\|Denison Olmsted Whereas at its greatest distance from the sun (aphelion) the velocity is reduced to about 10 feet a second! Astronomical Curiosities\|J. Ellard Gore British Dictionary definitions for aphelion aphelion / (æpˈhiːlɪən, əˈfiː-) / noun plural -lia (-lɪə) the point in its orbit when a planet or comet is at its greatest distance from the sunCompare perihelion Derived forms of aphelion aphelian, adjective Word Origin for aphelion C17: from New Latin aphēlium (with pseudo-Greek ending -ion) from ap- + 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 aphelion aphelion [ ə-fē′lē-ən ] The point at which an orbiting body, such as a planet or comet, is farthest away from the Sun. Compare apogee perihelion. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
随便看	gestaltism gestalt phenomenon gestalt psychology gestalt psychotherapy gestalt therapy gestapo gesta romanorum gestate gestation gestational age gestational carrier gestational edema gestational proteinuria gestational psychosis gestatorial chair gestic gesticulant gesticular gesticulate gesticulation gestosis gesture gesualdo gesundheit get