equatorial

adjective
equa·​to·​ri·​al | \ ˌē-kwə-ˈtȯr-ē-əl How to pronounce equatorial (audio) , ˌe-kwə-\

Definition of equatorial

1a : of, relating to, or located at the equator or an equator also : being in the plane of the equator a satellite in equatorial orbit
b : of, originating in, or suggesting the region around the geographic equator
2a : being or having a support that includes two axles at right angles to each other with one parallel to the earth's axis of rotation an equatorial telescope mount
b : extending in a direction essentially in the plane of a cyclic structure (as of cyclohexane) equatorial hydrogens — compare axial

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Synonyms & Antonyms for equatorial

Synonyms

low, tropical

Antonyms

polar

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Examples of equatorial in a Sentence

a lush equatorial rain forest that is threatened by rampant development

Recent Examples on the Web

These vertical launch rockets will all rise from the EU’s equatorial spaceport in French Guiana. Joe Pappalardo, Popular Mechanics, "How American Space Launch Left Europe in the Dust," 18 Oct. 2018 Other skillful indicators this time of the year are the strength of the Bermuda High and the magnitude of the equatorial upper-level winds in the Pacific. Brian Mcnoldy, Washington Post, "As hurricane season begins, Colorado State lowers its prediction for the year," 31 May 2018 Small launch companies may be even more interested, attracted by an equatorial spin that produces 30 percent fuel savings. Joe Pappalardo, Popular Mechanics, "Can the U.S. Save Alcantara, Brazil’s Cursed Spaceport?," 20 Mar. 2019 Set against an arid moonscape on the equatorial line, two cantilevered glass wings soar dramatically above a reflecting pool, symbolizing freedom and transparency and looking like something out of a science-fiction movie. Joshua Goodman, The Seattle Times, "South America bloc’s woes leave architectural gem forlorn," 8 Jan. 2019 Next comes a kitchen team—the president’s personal chefs from Cameroon—hauling jugs of palm oil and equatorial spices. Joe Parkinson, WSJ, "Can’t Find Cameroon’s President? Try Geneva’s Intercontinental Hotel," 4 Nov. 2018 The researchers found sublimation to be the dominant factor on equatorial Europa, the regions within 23 degrees of the moon's equator. Mike Wall, Space.com, "Jupiter Moon Europa's Jagged Ice Towers Could Imperil Robot Landers," 8 Oct. 2018 Head over here for a primer on what the equatorial Pacific Ocean looks like under neutral, El Niño, or La Niña conditions. Megan Barber, Curbed, "El Niño watch: Here’s what it means for cities," 19 Sep. 2018 What’s more, if all of Mars’ equatorial lakes did this, enough hydrogen gas would be released to push the climate above the freezing point. Scott K. Johnson, Ars Technica, "The secret to Mars’ past warmth could be beneath Curiosity’s wheels," 9 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'equatorial.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of equatorial

1664, in the meaning defined at sense 1a

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Statistics for equatorial

Last Updated

18 May 2019

Look-up Popularity

Time Traveler for equatorial

The first known use of equatorial was in 1664

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More Definitions for equatorial

equatorial

adjective

English Language Learners Definition of equatorial

: of or relating to the equator : located at or near the equator

equatorial

adjective
equa·​to·​ri·​al | \ ˌē-kwə-ˈtȯr-ē-əl How to pronounce equatorial (audio) , ˌe-kwə-\

Kids Definition of equatorial

: relating to or lying near the equator an equatorial climate

equatorial

adjective
equa·​to·​ri·​al | \ ˌē-kwə-ˈtōr-ē-əl How to pronounce equatorial (audio) , ˌek-wə- How to pronounce equatorial (audio) , -ˈtȯr-\

Medical Definition of equatorial

1 : of, located at, or relating to an equator equatorial diameter
2 : extending in a direction essentially in the plane of a cyclic structure (as of cyclohexane) equatorial hydrogen atoms — compare axial sense 2b

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Comments on equatorial

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