pro·​grade | \ ˈprō-ˌgrād How to pronounce prograde (audio) \

Definition of prograde

: having or being a direction of rotation or revolution that is counterclockwise as viewed from the north pole of the sky or a planet

Examples of prograde in a Sentence

Recent Examples on the Web Asteroids with prograde rotations (spinning from west to east, like Earth does) drift away from the sun under this thrust. Dante S. Lauretta, Scientific American, "To Bennu and Back," 1 Aug. 2016 Two of the three prograde moons fit within the Inuit group, which have angles of inclination of around 46 degrees. Jennifer Leman, Popular Mechanics, "Saturn Is the New Moon King," 8 Oct. 2019 One of the prograde moons has an angle of 36 degrees, similar to the other prograde moons close to Saturn named for Gallic mythology. Ashley Strickland, CNN, "Astronomers find 20 new moons around Saturn and you can help name them," 7 Oct. 2019 Sending a spacecraft to gently land upon or orbit the object would be extremely difficult, as such a probe would have to burn huge amounts of fuel to cancel out its prograde velocity. Lee Billings, Scientific American, "Astronomers Spot Potential "Interstellar" Asteroid Orbiting Backward around the Sun," 21 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prograde.' 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 prograde

1707, in the meaning defined above

History and Etymology for prograde

Latin pro- forward + English -grade (as in retrograde)

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Time Traveler for prograde

Time Traveler

The first known use of prograde was in 1707

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Statistics for prograde

Last Updated

27 Oct 2020

Cite this Entry

“Prograde.” Dictionary, Merriam-Webster, Accessed 28 Nov. 2020.

More from Merriam-Webster on prograde

Britannica English: Translation of prograde for Arabic Speakers

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