Dictionary.com

perihelion

[ per-uh-hee-lee-uhn, -heel-yuhn ]
/ ˌpɛr əˈhi li ən, -ˈhil yən /
Save This Word!

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.

QUIZZES

QUIZ YOURSELF ON "WAS" VS. "WERE"!

Were you ready for a quiz on this topic? Well, here it is! See how well you can differentiate between the uses of "was" vs. "were" in this quiz.
Question 1 of 7
“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing

Meet Grammar Coach

Improve Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for perihelion

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-hēlē-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.
FEEDBACK