ecliptic

1 of 2

adjective

eclip·​tic i-ˈklip-tik How to pronounce ecliptic (audio)
: of or relating to the ecliptic or an eclipse

ecliptic

2 of 2

noun

: the great circle of the celestial sphere that is the apparent path of the sun among the stars or of the earth as seen from the sun : the plane of the earth's orbit extended to meet the celestial sphere

Examples of ecliptic in a Sentence

Recent Examples on the Web
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Adjective
Saturn, like Earth, has a large axial tilt that is more than 26 degrees askew from the ecliptic plane in which all the major planets orbit. Phil Plait, Scientific American, 23 Jan. 2025 Since all planets orbit the sun on the same plane — called the ecliptic — planets are always aligned. Jamie Carter, Forbes, 17 Jan. 2025
Noun
The astronomical alignment is technically called the ecliptic, which represents the plane of the solar system where planets orbit around the Sun, according to NASA. Hannah Poukish, Sacramento Bee, 11 Jan. 2025 This situation repeats every 18.6 years, the time required for the ascending node to complete one circuit of the ecliptic. Joe Rao, Space.com, 9 Jan. 2025 See all Example Sentences for ecliptic 

Word History

Etymology

Adjective

Middle English ekliptik, borrowed from Latin eclīpticus, borrowed from Greek ekleiptikós, from ekleípein "to be obscured (of a celestial body)" + -t-, verbal adjective ending + -ikos -ic entry 1 — more at eclipse entry 1

Noun

Middle English ekliptik, borrowed from Medieval Latin eclīptica (short for eclīptica līnea "ecliptic line"), from feminine of Latin eclīpticus ecliptic entry 1; so called because eclipses occur on or near the ecliptic

First Known Use

Adjective

14th century, in the meaning defined above

Noun

15th century, in the meaning defined above

Time Traveler
The first known use of ecliptic was in the 14th century

Dictionary Entries Near ecliptic

Cite this Entry

“Ecliptic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ecliptic. Accessed 31 Jan. 2025.

Kids Definition

ecliptic

noun
eclip·​tic
i-ˈklip-tik
: the great circle of the celestial sphere on which the sun appears to move among the stars

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