mi·​cro·​grav·​i·​ty | \-ˈgra-və-tē \

Definition of microgravity 

: a condition in space in which only minuscule forces are experienced : virtual absence of gravity broadly : a condition of weightlessness

Examples of microgravity in a Sentence

Recent Examples on the Web

Back in 1988, bull sperm was put into sounding rockets and blasted into the air to see how the sperm would react in microgravity. Elly Belle, Teen Vogue, "Scientists Are Studying How Sperm Functions in Space," 17 July 2018 Soaring to Sirius The next set of missions, called Sirius, will examine how people behave in microgravity, Voloshin said. Elizabeth Howell, Space.com, "Touring Where the Mars-500 'Astronauts' Pretended to Take a Red Planet Journey," 11 July 2018 In a near vacuum, some metals fuse together, while that same vacuum can vaporize the kinds of lubricants found inside conventional weapons. Weapons-makers must account for microgravity when considering things like recoil. John Wenz, Popular Mechanics, "The Pentagon's Far-Out 1950s Dreams of Space Guns," 10 Nov. 2015 His year in space will show the effects of microgravity on the human body over a long period, helping scientists better understand some of the potential issues with a Mars mission. John Wenz, Popular Mechanics, "Scott Kelly's Year-Long ISS Mission Has Officially Begun," 27 Mar. 2015 Humanity now has only a toehold in space, and microgravity science is so new that the equipment to do it is just now being developed and tested. Joe Pappalardo, Popular Mechanics, "How Space Crystals Could Lead To New Cancer Drugs," 5 June 2018 The patterns should be sensitive to tiny changes in the microgravity of space, which could make them good navigational tools. Sophia Chen, WIRED, "The Quest to Make Super Cold Quantum Blobs in Space," 25 June 2018 In the new study, the researchers dropped the full experimental set up for photocatalysis down a 120m drop tower, creating an environment similar to microgravity. Charles W. Dunnill, Scientific American, "Method of Making Oxygen from Water in Zero Gravity Raises Hope for Long-Distance Space Travel," 10 July 2018 On station, Cimon and Gerst have three to-dos together, the first being an experiment about how crystals form in microgravity. Sarah Scoles, WIRED, "The Floating Robot With an IBM Brain Is Headed to Space," 28 June 2018

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

See More

First Known Use of microgravity

1974, in the meaning defined above

Keep scrolling for more

Learn More about microgravity

Share microgravity

Statistics for microgravity

Last Updated

14 Nov 2018

Look-up Popularity

Time Traveler for microgravity

The first known use of microgravity was in 1974

See more words from the same year

Keep scrolling for more

Comments on microgravity

What made you want to look up microgravity? Please tell us where you read or heard it (including the quote, if possible).


noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!